diff --git a/gradoop-checkstyle/src/main/resources/gradoop/LICENSE.txt b/gradoop-checkstyle/src/main/resources/gradoop/LICENSE.txt
index 199e2778e910..f31386cfc3ff 100644
--- a/gradoop-checkstyle/src/main/resources/gradoop/LICENSE.txt
+++ b/gradoop-checkstyle/src/main/resources/gradoop/LICENSE.txt
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/config/GradoopConfig.java b/gradoop-common/src/main/java/org/gradoop/common/config/GradoopConfig.java
index 540095e5f553..f58e5dc1b92e 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/config/GradoopConfig.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/config/GradoopConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/config/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/config/package-info.java
index 74e79ecb9c75..fdd83cea722a 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/config/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/config/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/exceptions/UnsupportedTypeException.java b/gradoop-common/src/main/java/org/gradoop/common/exceptions/UnsupportedTypeException.java
index 45123a4d0aea..1a83a3e43a0e 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/exceptions/UnsupportedTypeException.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/exceptions/UnsupportedTypeException.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/exceptions/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/exceptions/package-info.java
index 490d1c7cc2d9..d2c651990f59 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/exceptions/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/exceptions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Attributed.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Attributed.java
index 45c019361f01..02bb1124ac60 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Attributed.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Attributed.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Edge.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Edge.java
index 42285c072fbb..e0193b3561c1 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Edge.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Edge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/EdgeFactory.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/EdgeFactory.java
index b6f61bc29d85..3d2bea78fd36 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/EdgeFactory.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/EdgeFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Element.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Element.java
index 602600de7e80..5f968ded927f 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Element.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Element.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/ElementFactory.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/ElementFactory.java
index 4edd33634ecb..3326ae0c9ff3 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/ElementFactory.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/ElementFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/ElementFactoryProvider.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/ElementFactoryProvider.java
index 98aa05fac7a5..6414e7137856 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/ElementFactoryProvider.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/ElementFactoryProvider.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphElement.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphElement.java
index fd0b16c5e73d..b0c875b7cc80 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphElement.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphHead.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphHead.java
index 42f8a5a27045..3ad3d7cf19c2 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphHead.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphHeadFactory.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphHeadFactory.java
index 3a153163aefb..3e6a2c1bcb0f 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphHeadFactory.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/GraphHeadFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Identifiable.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Identifiable.java
index 409bbadfc52c..80fc45506354 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Identifiable.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Identifiable.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Labeled.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Labeled.java
index 53e6733c8b12..74a7678a7118 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Labeled.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Labeled.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Vertex.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Vertex.java
index 92a7d489ba2c..179d6537770d 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Vertex.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/Vertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/VertexFactory.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/VertexFactory.java
index a0c68131e990..35432b4400ff 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/VertexFactory.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/VertexFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/package-info.java
index 5d31478b1eed..a7ceeb997639 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/entities/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/strategies/PropertyValueStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/strategies/PropertyValueStrategy.java
index ac250810d703..cb329afac73b 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/strategies/PropertyValueStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/strategies/PropertyValueStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/api/strategies/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/model/api/strategies/package-info.java
index f7dffe619a17..3713fc38850c 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/api/strategies/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/api/strategies/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/comparators/IdentifiableComparator.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/comparators/IdentifiableComparator.java
index ae15782bdda0..3c07a9801123 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/comparators/IdentifiableComparator.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/comparators/IdentifiableComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/comparators/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/comparators/package-info.java
index f0cc023bd826..ece967cea981 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/comparators/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/comparators/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/GradoopId.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/GradoopId.java
index e0995d3e3471..38a8391f0f7e 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/GradoopId.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/GradoopId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/GradoopIdSet.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/GradoopIdSet.java
index a2c9aff81f7f..954704efafc5 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/GradoopIdSet.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/GradoopIdSet.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/package-info.java
index 83a4108fc2d7..3772ebdb4017 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/id/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/MetaData.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/MetaData.java
index b7064277172a..48ecbb344112 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/MetaData.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/MetaData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/PropertyMetaData.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/PropertyMetaData.java
index 4be70ffee923..52b997785822 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/PropertyMetaData.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/PropertyMetaData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/package-info.java
index 9af992f1af51..dad51154b381 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/metadata/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMEdge.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMEdge.java
index d30b99ab6792..491b990c0082 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMEdge.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMEdgeFactory.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMEdgeFactory.java
index 0eae3c937674..9531209d6677 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMEdgeFactory.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMEdgeFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMElement.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMElement.java
index 08b1e767ec2e..4b43494860bc 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMElement.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphElement.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphElement.java
index 557215b26f6c..8eff6bd7f242 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphElement.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphHead.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphHead.java
index 6c4661d4114a..0ff1669c4927 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphHead.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphHeadFactory.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphHeadFactory.java
index d73b1371aeb8..c685734027aa 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphHeadFactory.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMGraphHeadFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMVertex.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMVertex.java
index 7dbb8449b208..4b3d88b373ea 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMVertex.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMVertexFactory.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMVertexFactory.java
index bae2bbe1d16f..a6cf50b994b4 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMVertexFactory.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/EPGMVertexFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/package-info.java
index 9a0862ea3581..db387615c600 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/pojo/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/DateTimeSerializer.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/DateTimeSerializer.java
index 253001b23319..2679b56f596e 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/DateTimeSerializer.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/DateTimeSerializer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Properties.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Properties.java
index a0ceb2f6e523..4e2588722690 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Properties.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Properties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Property.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Property.java
index 33061f7a6c93..2324e159ba49 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Property.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Property.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValue.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValue.java
index e5c53d812ccd..23fe307dd609 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValue.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValueList.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValueList.java
index 0bee9da40dc5..bc016a6b6f89 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValueList.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValueList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValueUtils.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValueUtils.java
index e732ed2e8a40..37d80a1d3579 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValueUtils.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/PropertyValueUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Type.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Type.java
index 411afde9fe20..b98c251b5a6e 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Type.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/Type.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/Bytes.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/Bytes.java
index 8b139be6915e..c7efc9ae266f 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/Bytes.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/Bytes.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/UnsafeAvailChecker.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/UnsafeAvailChecker.java
index 29990acfa6d4..9a810d8df469 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/UnsafeAvailChecker.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/UnsafeAvailChecker.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/package-info.java
index eaba6627799c..6870ee90afed 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/bytes/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/package-info.java
index a808ff824673..127e9d9dd312 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/AbstractFixSizedPropertyValueStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/AbstractFixSizedPropertyValueStrategy.java
index 9ea12e321dc6..219a75c3e678 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/AbstractFixSizedPropertyValueStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/AbstractFixSizedPropertyValueStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/AbstractVariableSizedPropertyValueStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/AbstractVariableSizedPropertyValueStrategy.java
index fd4416b071f1..d613b4be859c 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/AbstractVariableSizedPropertyValueStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/AbstractVariableSizedPropertyValueStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/BigDecimalStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/BigDecimalStrategy.java
index cc95872df5d0..e970bff3ffd6 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/BigDecimalStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/BigDecimalStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/BooleanStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/BooleanStrategy.java
index 645f5465e33c..02f140beda39 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/BooleanStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/BooleanStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DateStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DateStrategy.java
index 5fe5c44a6bb4..de756910dfc7 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DateStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DateStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DateTimeStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DateTimeStrategy.java
index 0b641e07d77f..2b3cc9769be6 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DateTimeStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DateTimeStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DoubleStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DoubleStrategy.java
index a8fdbf9cc311..27cd1c98f9d4 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DoubleStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/DoubleStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/FloatStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/FloatStrategy.java
index 81dfec28bf5f..0b107067550a 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/FloatStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/FloatStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/GradoopIdStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/GradoopIdStrategy.java
index b94d828d4f3d..ee5124a44fb9 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/GradoopIdStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/GradoopIdStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/IntegerStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/IntegerStrategy.java
index cddc50d91a21..13a7180d2c45 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/IntegerStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/IntegerStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/ListStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/ListStrategy.java
index 8b1b32bc5e0f..112c4a199804 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/ListStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/ListStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/LongStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/LongStrategy.java
index 2f783c0a34a3..5ca9e234deb2 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/LongStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/LongStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/MapStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/MapStrategy.java
index 351b8929b358..2fbf9d802d56 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/MapStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/MapStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/NullStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/NullStrategy.java
index 521b97cde3d8..ebab07e3d7d0 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/NullStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/NullStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/PropertyValueStrategyFactory.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/PropertyValueStrategyFactory.java
index e0ed81a4ee1f..a069686dad2c 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/PropertyValueStrategyFactory.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/PropertyValueStrategyFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/PropertyValueStrategyUtils.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/PropertyValueStrategyUtils.java
index 229227353d87..97e9298b39a0 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/PropertyValueStrategyUtils.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/PropertyValueStrategyUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/SetStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/SetStrategy.java
index d4353883592f..582e5b9a38f9 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/SetStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/SetStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/ShortStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/ShortStrategy.java
index 89f0313081be..5aa313bf33ee 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/ShortStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/ShortStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/StringStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/StringStrategy.java
index 274216cd0f3d..5561d02c13b3 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/StringStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/StringStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/TimeStrategy.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/TimeStrategy.java
index a0c2907125ed..cb9a8a27208e 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/TimeStrategy.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/TimeStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/package-info.java
index 9d694305bd68..7a7e1203e702 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/model/impl/properties/strategies/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/util/AsciiGraphLoader.java b/gradoop-common/src/main/java/org/gradoop/common/util/AsciiGraphLoader.java
index d73a8f60b35b..a51b7983aa98 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/util/AsciiGraphLoader.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/util/AsciiGraphLoader.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/util/GradoopConstants.java b/gradoop-common/src/main/java/org/gradoop/common/util/GradoopConstants.java
index 707acb3393c1..2ff9ff36b72c 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/util/GradoopConstants.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/util/GradoopConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/util/Order.java b/gradoop-common/src/main/java/org/gradoop/common/util/Order.java
index e50d3e9cd490..c785dc4d147e 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/util/Order.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/util/Order.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/main/java/org/gradoop/common/util/package-info.java b/gradoop-common/src/main/java/org/gradoop/common/util/package-info.java
index b444b4720d3d..62da49c27f8c 100644
--- a/gradoop-common/src/main/java/org/gradoop/common/util/package-info.java
+++ b/gradoop-common/src/main/java/org/gradoop/common/util/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/GradoopTestUtils.java b/gradoop-common/src/test/java/org/gradoop/common/GradoopTestUtils.java
index 3c7597e8fcdf..618df68ce271 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/GradoopTestUtils.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/GradoopTestUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/id/GradoopIdTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/id/GradoopIdTest.java
index 7ca9eaba015c..a1816615ce62 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/id/GradoopIdTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/id/GradoopIdTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/id/GradoopIdsTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/id/GradoopIdsTest.java
index 86dfeb15be01..e4c66c229406 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/id/GradoopIdsTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/id/GradoopIdsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/metadata/MetaDataTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/metadata/MetaDataTest.java
index 4b767a573e67..2d3fc4b85879 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/metadata/MetaDataTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/metadata/MetaDataTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/EdgeTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/EdgeTest.java
index 375f7039aacc..931c8de5965c 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/EdgeTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/EdgeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/ElementTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/ElementTest.java
index 3186b964491b..37f0029ac5c8 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/ElementTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/ElementTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/GraphElementTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/GraphElementTest.java
index 759ea9efe00c..743a4d5f01f4 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/GraphElementTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/GraphElementTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/GraphHeadTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/GraphHeadTest.java
index 189e702ec44d..d0e98d7f69d4 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/GraphHeadTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/GraphHeadTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/VertexTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/VertexTest.java
index 6402f4e643c6..6a790e54838d 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/VertexTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/pojo/VertexTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertiesTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertiesTest.java
index 3fcc3f21f8de..e98439966438 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertiesTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertiesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyTest.java
index 7edb93b5bdd3..3288c65df57d 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueListTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueListTest.java
index 36e6d6e87b87..1188ad9b9bb2 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueListTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueListTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueTest.java
index 2e4ed42caccf..db1b15c4a1a7 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueTestProvider.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueTestProvider.java
index b33f2725840e..54ffd644036a 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueTestProvider.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueTestProvider.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueUtilsTest.java b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueUtilsTest.java
index 3432263e813b..c791aea6a066 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueUtilsTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/model/impl/properties/PropertyValueUtilsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-common/src/test/java/org/gradoop/common/util/AsciiGraphLoaderTest.java b/gradoop-common/src/test/java/org/gradoop/common/util/AsciiGraphLoaderTest.java
index e61033cbf2d3..c354ef230a03 100644
--- a/gradoop-common/src/test/java/org/gradoop/common/util/AsciiGraphLoaderTest.java
+++ b/gradoop-common/src/test/java/org/gradoop/common/util/AsciiGraphLoaderTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/MinimalCSVImporter.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/MinimalCSVImporter.java
index 7185dde72367..518184c72bcc 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/MinimalCSVImporter.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/MinimalCSVImporter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/CsvRowToProperties.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/CsvRowToProperties.java
index ba8e56efbf67..4d387a6534e8 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/CsvRowToProperties.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/CsvRowToProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/PropertiesToVertex.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/PropertiesToVertex.java
index 7fe4231ed871..b9d0ac12e072 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/PropertiesToVertex.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/PropertiesToVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/package-info.java
index 2ad4e1a3afb5..401a7aaf3c55 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/package-info.java
index dd98bb34a4d4..f61052e4c96b 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/csv/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/MinimalJSONImporter.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/MinimalJSONImporter.java
index d3cd2a1d6651..4cd6a36c5f49 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/MinimalJSONImporter.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/MinimalJSONImporter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/functions/MinimalJsonToVertex.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/functions/MinimalJsonToVertex.java
index 78ba4943c3a3..e15c340043f9 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/functions/MinimalJsonToVertex.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/functions/MinimalJsonToVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/functions/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/functions/package-info.java
index 97120d54611c..27160abf2adf 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/functions/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/package-info.java
index cebaf0cc1dfd..a01a69ddaecb 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/impl/json/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/package-info.java
index a6e62fcd93ee..e483b29de33a 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/importer/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/ConnectNeighbors.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/ConnectNeighbors.java
index d3fd3a923d91..960046efd5fd 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/ConnectNeighbors.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/ConnectNeighbors.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/EdgeToVertex.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/EdgeToVertex.java
index 6815f0954282..a78c13c3724c 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/EdgeToVertex.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/EdgeToVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/PropagatePropertyToNeighbor.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/PropagatePropertyToNeighbor.java
index 7a60f63931f3..68342c98d8e8 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/PropagatePropertyToNeighbor.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/PropagatePropertyToNeighbor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/VertexDeduplication.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/VertexDeduplication.java
index 89ec6260af2e..1d0de26c55df 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/VertexDeduplication.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/VertexDeduplication.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/VertexToEdge.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/VertexToEdge.java
index bb15670ae01c..2506a10356c8 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/VertexToEdge.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/VertexToEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/api/PropertyTransformationFunction.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/api/PropertyTransformationFunction.java
index 6e2f8b8a2629..74362d950821 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/api/PropertyTransformationFunction.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/api/PropertyTransformationFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/api/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/api/package-info.java
index bc7e35a8fdac..efdc7d30538d 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/api/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/AccumulatePropagatedValues.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/AccumulatePropagatedValues.java
index 8ef0366d28df..bd00501dbb1b 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/AccumulatePropagatedValues.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/AccumulatePropagatedValues.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/BuildIdPropertyValuePairs.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/BuildIdPropertyValuePairs.java
index 0f83392b8b82..209e1914c7aa 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/BuildIdPropertyValuePairs.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/BuildIdPropertyValuePairs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/BuildTargetVertexIdPropertyValuePairs.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/BuildTargetVertexIdPropertyValuePairs.java
index 42e1d78aaa44..62407a7fc94d 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/BuildTargetVertexIdPropertyValuePairs.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/BuildTargetVertexIdPropertyValuePairs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateCartesianNeighborhoodEdges.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateCartesianNeighborhoodEdges.java
index 334a1f7af3e2..a6e1238beae2 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateCartesianNeighborhoodEdges.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateCartesianNeighborhoodEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateEdgesFromTriple.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateEdgesFromTriple.java
index d42b090b4d32..91a7e1a02f39 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateEdgesFromTriple.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateEdgesFromTriple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateMappingFromMarkedDuplicates.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateMappingFromMarkedDuplicates.java
index f08367ce83a7..3778ef9c803d 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateMappingFromMarkedDuplicates.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateMappingFromMarkedDuplicates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateNeighborList.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateNeighborList.java
index a0e38d45d89a..32d11453d87d 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateNeighborList.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateNeighborList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateVertexFromEdges.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateVertexFromEdges.java
index 9ea2a9db59c9..1eacace1c4cd 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateVertexFromEdges.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/CreateVertexFromEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/EdgesFromLocalTransitiveClosure.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/EdgesFromLocalTransitiveClosure.java
index 4173d1ce3207..d75d85e94c78 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/EdgesFromLocalTransitiveClosure.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/EdgesFromLocalTransitiveClosure.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/GetPropertiesAsList.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/GetPropertiesAsList.java
index 6bb0daa66d65..1ec531658a3d 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/GetPropertiesAsList.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/GetPropertiesAsList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/MarkDuplicatesInGroup.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/MarkDuplicatesInGroup.java
index ff2652cff9ae..a29cde20a0bb 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/MarkDuplicatesInGroup.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/MarkDuplicatesInGroup.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/package-info.java
index bd8cd0dc8ed0..0f694d3e8df2 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/BasePropertyTransformationFunction.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/BasePropertyTransformationFunction.java
index ca28b2353a8d..a6eb8c424696 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/BasePropertyTransformationFunction.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/BasePropertyTransformationFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/ExtractPropertyFromVertex.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/ExtractPropertyFromVertex.java
index cb22da4f4a9a..2a02f9324415 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/ExtractPropertyFromVertex.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/ExtractPropertyFromVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/InvertEdges.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/InvertEdges.java
index 5729add47cf1..feb3dd5a5520 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/InvertEdges.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/InvertEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/Neighborhood.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/Neighborhood.java
index e2867d78d2ee..f05abc68340b 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/Neighborhood.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/Neighborhood.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/NeighborhoodVertex.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/NeighborhoodVertex.java
index e58ad4c4162b..40553aaafca3 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/NeighborhoodVertex.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/NeighborhoodVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/PropertyTransformation.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/PropertyTransformation.java
index ac08dce22497..e1b06549efd8 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/PropertyTransformation.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/PropertyTransformation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/config/EdgeDirection.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/config/EdgeDirection.java
index 34c855c051d3..1e1e6ea1d8db 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/config/EdgeDirection.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/config/EdgeDirection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/config/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/config/package-info.java
index b319e5abbed9..d8bc55030643 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/config/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/config/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewEdges.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewEdges.java
index 6e02c1b1e0a2..c900fa31eb4f 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewEdges.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewVertex.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewVertex.java
index 7e37d436e40c..8ef076cdaacf 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewVertex.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewVertexWithEqualityCondense.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewVertexWithEqualityCondense.java
index 141176a7f147..928f0b965a43 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewVertexWithEqualityCondense.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/CreateNewVertexWithEqualityCondense.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/DivideBy.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/DivideBy.java
index 545b07e0da31..237e030965a5 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/DivideBy.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/DivideBy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/ExtractPropertyWithOriginId.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/ExtractPropertyWithOriginId.java
index 39c4e6f315c7..c1ab58491534 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/ExtractPropertyWithOriginId.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/ExtractPropertyWithOriginId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/package-info.java
index 18405fde8c6b..c6fd201e5e63 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/package-info.java
index 4c836e2c8332..cf60814b7f4d 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/impl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/package-info.java b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/package-info.java
index dc1988634c84..c79babf89eac 100644
--- a/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/package-info.java
+++ b/gradoop-data-integration/src/main/java/org/gradoop/dataintegration/transformation/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/csv/MinimalCSVImporterTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/csv/MinimalCSVImporterTest.java
index 67070f8f57f3..54b2eb689c63 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/csv/MinimalCSVImporterTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/csv/MinimalCSVImporterTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/json/MinimalJSONImporterTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/json/MinimalJSONImporterTest.java
index 61da8d07752f..912be5e7ce02 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/json/MinimalJSONImporterTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/json/MinimalJSONImporterTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/json/functions/MinimalJsonToVertexTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/json/functions/MinimalJsonToVertexTest.java
index 07960fe8999a..e02c1d819794 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/json/functions/MinimalJsonToVertexTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/importer/impl/json/functions/MinimalJsonToVertexTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/ConnectNeighborsTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/ConnectNeighborsTest.java
index 059d60bfe331..c86f036520db 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/ConnectNeighborsTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/ConnectNeighborsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/EdgeToVertexTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/EdgeToVertexTest.java
index e73d26da12d2..1d8438e68078 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/EdgeToVertexTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/EdgeToVertexTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/PropagatePropertyToNeighborTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/PropagatePropertyToNeighborTest.java
index 7573587be767..8c0f8da12335 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/PropagatePropertyToNeighborTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/PropagatePropertyToNeighborTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/VertexDeduplicationTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/VertexDeduplicationTest.java
index 9fdaea6c933f..448560176bf3 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/VertexDeduplicationTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/VertexDeduplicationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/VertexToEdgeTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/VertexToEdgeTest.java
index 7bacc8822f7b..5d537a2acacc 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/VertexToEdgeTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/VertexToEdgeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/AccumulatePropagatedValuesTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/AccumulatePropagatedValuesTest.java
index ddf59137c207..c845a6b057fc 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/AccumulatePropagatedValuesTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/AccumulatePropagatedValuesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/BuildIdPropertyValuePairsTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/BuildIdPropertyValuePairsTest.java
index dc9f22b2fa22..46d397ebbe87 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/BuildIdPropertyValuePairsTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/BuildIdPropertyValuePairsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/BuildTargetVertexIdPropertyValuePairsTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/BuildTargetVertexIdPropertyValuePairsTest.java
index 66d81d6b1551..ed55681b197d 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/BuildTargetVertexIdPropertyValuePairsTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/BuildTargetVertexIdPropertyValuePairsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateCartesianNeighborhoodEdgesTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateCartesianNeighborhoodEdgesTest.java
index 50a9f52f63f7..765964dce191 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateCartesianNeighborhoodEdgesTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateCartesianNeighborhoodEdgesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateEdgesFromTripleTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateEdgesFromTripleTest.java
index 999455438773..cd6381494914 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateEdgesFromTripleTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateEdgesFromTripleTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateMappingFromMarkedDuplicatesTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateMappingFromMarkedDuplicatesTest.java
index ee1a209db86e..ebe35fbf1b1d 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateMappingFromMarkedDuplicatesTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateMappingFromMarkedDuplicatesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateVertexFromEdgesTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateVertexFromEdgesTest.java
index 9ba1fe1d44d7..ab6949cf67ac 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateVertexFromEdgesTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/CreateVertexFromEdgesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/GetPropertiesAsListTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/GetPropertiesAsListTest.java
index fd688af62e32..436888c56de3 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/GetPropertiesAsListTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/GetPropertiesAsListTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/MarkDuplicatesInGroupTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/MarkDuplicatesInGroupTest.java
index 1d9cf78bf5d4..2fef12c5bc02 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/MarkDuplicatesInGroupTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/MarkDuplicatesInGroupTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/NeighborhoodTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/NeighborhoodTest.java
index 61ab051e3f60..617e942137e6 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/NeighborhoodTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/functions/NeighborhoodTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/ExtractPropertyFromVertexTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/ExtractPropertyFromVertexTest.java
index 9e5598df27e4..56dc2cb8d4f5 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/ExtractPropertyFromVertexTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/ExtractPropertyFromVertexTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/InvertEdgesTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/InvertEdgesTest.java
index c925088f251c..6e234bdb07b2 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/InvertEdgesTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/InvertEdgesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/PropertyTransformationTest.java b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/PropertyTransformationTest.java
index ca1b57c69f76..f2e89913ce92 100644
--- a/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/PropertyTransformationTest.java
+++ b/gradoop-data-integration/src/test/java/org/gradoop/dataintegration/transformation/impl/PropertyTransformationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/AggregationExample.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/AggregationExample.java
index 96f375ed75c7..3e5a2ba89800 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/AggregationExample.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/AggregationExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/functions/AggregateListOfNames.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/functions/AggregateListOfNames.java
index c4b9081c726d..32d920122053 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/functions/AggregateListOfNames.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/functions/AggregateListOfNames.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/functions/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/functions/package-info.java
index 69e3b3dc11dc..6a7cc24ca485 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/functions/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/package-info.java
index b9d5872f580d..7d200698ce55 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/aggregation/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/common/SocialNetworkGraph.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/common/SocialNetworkGraph.java
index bba435020bd0..abf3583901fb 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/common/SocialNetworkGraph.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/common/SocialNetworkGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/common/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/common/package-info.java
index f0c1bdd1fb0f..5e608f4d9e0f 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/common/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/common/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/communities/GellyCommunitiesExample.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/communities/GellyCommunitiesExample.java
index 2bc2d5296bdd..86019659653a 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/communities/GellyCommunitiesExample.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/communities/GellyCommunitiesExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/communities/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/communities/package-info.java
index 7dc1f7db5e64..0427219f8452 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/communities/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/communities/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/DIMSpanExample.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/DIMSpanExample.java
index 03a7fe174d67..5b8ba31118af 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/DIMSpanExample.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/DIMSpanExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/data/DIMSpanData.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/data/DIMSpanData.java
index 598527ddede5..1bc0d7b9ac14 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/data/DIMSpanData.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/data/DIMSpanData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/data/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/data/package-info.java
index f08bc34902e8..5be3e5bb4cfe 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/data/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/data/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/package-info.java
index f340c3366565..c83f799fde24 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/frequentpattern/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/grouping/SchemaGraphExample.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/grouping/SchemaGraphExample.java
index a805ddb9ffc9..a11d12e5581f 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/grouping/SchemaGraphExample.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/grouping/SchemaGraphExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/grouping/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/grouping/package-info.java
index ed7c16b65d76..d9c7c5adfd47 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/grouping/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/grouping/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/KeyedGroupingExample.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/KeyedGroupingExample.java
index 113767dbe0cb..6f7107b03fd4 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/KeyedGroupingExample.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/KeyedGroupingExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/functions/AgeRoundedTo10.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/functions/AgeRoundedTo10.java
index 12d3e20d01fc..cebec271b37e 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/functions/AgeRoundedTo10.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/functions/AgeRoundedTo10.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/functions/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/functions/package-info.java
index 27888dfb3a8a..16ceaa2820cc 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/functions/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/package-info.java
index c6d109c583f4..6ce5b9ae21ff 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/keyedgrouping/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/patternmatch/GDLQueryExample.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/patternmatch/GDLQueryExample.java
index 903f1c7e2581..0995c1042a31 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/patternmatch/GDLQueryExample.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/patternmatch/GDLQueryExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/patternmatch/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/patternmatch/package-info.java
index f37539ba73b4..94f630c61dda 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/patternmatch/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/patternmatch/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/QuickstartExample.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/QuickstartExample.java
index 6e316d99c1ce..c034c617ee37 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/QuickstartExample.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/QuickstartExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/data/QuickstartData.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/data/QuickstartData.java
index 523b15aec2c8..e3b0e822b2de 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/data/QuickstartData.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/data/QuickstartData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/data/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/data/package-info.java
index 695d07192bcb..1a9809845a5b 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/data/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/data/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/package-info.java b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/package-info.java
index 819c748b99ab..481e77cd7e59 100644
--- a/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/package-info.java
+++ b/gradoop-examples/gradoop-examples-operators/src/main/java/org/gradoop/examples/quickstart/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/aggregation/TemporalAggregationExample.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/aggregation/TemporalAggregationExample.java
index 5110f0eabda1..7745cea0f44e 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/aggregation/TemporalAggregationExample.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/aggregation/TemporalAggregationExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/aggregation/package-info.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/aggregation/package-info.java
index 02ef73cbd7f5..4524d2a73271 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/aggregation/package-info.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/aggregation/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/TemporalCitiBikeGraph.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/TemporalCitiBikeGraph.java
index 4060aeecb3d4..2f2bb58a3eca 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/TemporalCitiBikeGraph.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/TemporalCitiBikeGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/functions/TransformLongPropertiesToDateTime.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/functions/TransformLongPropertiesToDateTime.java
index f50eed57c424..22e9d6ad21bd 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/functions/TransformLongPropertiesToDateTime.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/functions/TransformLongPropertiesToDateTime.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/functions/package-info.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/functions/package-info.java
index 3b41ebeecaf0..b472e5776b11 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/functions/package-info.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/package-info.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/package-info.java
index 9d0cf1d58d64..e4e0aea3aef1 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/package-info.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/common/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/difference/DifferenceExample.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/difference/DifferenceExample.java
index e1f2e72143cf..7abddb473d07 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/difference/DifferenceExample.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/difference/DifferenceExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/difference/package-info.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/difference/package-info.java
index b4a1f1e07ed8..37ffcea3e0ed 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/difference/package-info.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/difference/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/grouping/TemporalGroupingExample.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/grouping/TemporalGroupingExample.java
index f1d772428671..b98365a94cd9 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/grouping/TemporalGroupingExample.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/grouping/TemporalGroupingExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/grouping/package-info.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/grouping/package-info.java
index 98abfd9993be..a7c1ad9eb1d0 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/grouping/package-info.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/grouping/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/snapshot/SnapshotExample.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/snapshot/SnapshotExample.java
index 291730a69ad8..852c7f2b2e28 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/snapshot/SnapshotExample.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/snapshot/SnapshotExample.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/snapshot/package-info.java b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/snapshot/package-info.java
index e3c679d16c08..613ad7f92fc3 100644
--- a/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/snapshot/package-info.java
+++ b/gradoop-examples/gradoop-examples-temporal/src/main/java/org/gradoop/examples/snapshot/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/BusinessTransactionGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/BusinessTransactionGraphs.java
index 139f9e7dd8d3..8081e3b3c0db 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/BusinessTransactionGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/BusinessTransactionGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/BtgMessenger.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/BtgMessenger.java
index ad0d8bd40719..57c1080b074d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/BtgMessenger.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/BtgMessenger.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/BtgUpdater.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/BtgUpdater.java
index a87a50d837dd..ccb774f63085 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/BtgUpdater.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/BtgUpdater.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/CollectGradoopIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/CollectGradoopIds.java
index ccbbf47c4532..22f0cc8ba10d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/CollectGradoopIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/CollectGradoopIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/ComponentToNewBtgId.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/ComponentToNewBtgId.java
index 669c6b17e9fa..8e0fde031dc5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/ComponentToNewBtgId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/ComponentToNewBtgId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/MasterData.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/MasterData.java
index ee9d32df5cc7..2627de5390e8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/MasterData.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/MasterData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/NewBtgGraphHead.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/NewBtgGraphHead.java
index 23602749aad8..600e07961d14 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/NewBtgGraphHead.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/NewBtgGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/SetBtgId.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/SetBtgId.java
index 1a7ea62028c4..b3fe7d0e2bee 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/SetBtgId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/SetBtgId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/SetBtgIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/SetBtgIds.java
index c4b552eb3a5c..13f2606c670f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/SetBtgIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/SetBtgIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/TargetIdBtgId.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/TargetIdBtgId.java
index 4a24c4de6f2c..ff9f0b6c14ea 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/TargetIdBtgId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/TargetIdBtgId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/TransactionalData.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/TransactionalData.java
index f818c38d703e..7360b29de3dd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/TransactionalData.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/TransactionalData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/package-info.java
index 0285075fddf9..94ac7a26e810 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/package-info.java
index 70a64becc22e..0ce5f3c8bd29 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/btgs/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/TransactionalFSM.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/TransactionalFSM.java
index 59b5f6cbca91..03a457597169 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/TransactionalFSM.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/TransactionalFSM.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/DIMSpan.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/DIMSpan.java
index 798499a31b78..3aa6b40cf6f4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/DIMSpan.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/DIMSpan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/AlphabeticalLabelComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/AlphabeticalLabelComparator.java
index b68230c110a7..f8ad195781de 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/AlphabeticalLabelComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/AlphabeticalLabelComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DFSBranchComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DFSBranchComparator.java
index 4eb74b71373b..b022e07b0d54 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DFSBranchComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DFSBranchComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DFSCodeComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DFSCodeComparator.java
index f534223d803d..f47c64f1f903 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DFSCodeComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DFSCodeComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DirectedDFSBranchComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DirectedDFSBranchComparator.java
index fd7a31d1df61..22ded601a69c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DirectedDFSBranchComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/DirectedDFSBranchComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/InverseProportionalLabelComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/InverseProportionalLabelComparator.java
index 46b913f80b4b..930948a66ec9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/InverseProportionalLabelComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/InverseProportionalLabelComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/LabelComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/LabelComparator.java
index 69aae31bd1d4..e2d1a542ceb4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/LabelComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/LabelComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/ProportionalLabelComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/ProportionalLabelComparator.java
index 99b1decaf5ea..970cad783bc2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/ProportionalLabelComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/ProportionalLabelComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/UndirectedDFSBranchComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/UndirectedDFSBranchComparator.java
index 3b85ebdb3279..b880b482a3b2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/UndirectedDFSBranchComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/UndirectedDFSBranchComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/package-info.java
index 974337d340ab..4807a1fce828 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/comparison/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DIMSpanConfig.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DIMSpanConfig.java
index dd6913a8c84f..93d35b13d875 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DIMSpanConfig.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DIMSpanConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DIMSpanConstants.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DIMSpanConstants.java
index cd24cebc4af2..55156d5fef5f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DIMSpanConstants.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DIMSpanConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DataflowStep.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DataflowStep.java
index 2fda83702f01..b4550caef74a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DataflowStep.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DataflowStep.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DictionaryType.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DictionaryType.java
index 134c2c1f1ce4..8768051cbd4f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DictionaryType.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/DictionaryType.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/package-info.java
index 1dbe487a45a8..d354158ec82f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/config/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/DFSCodeToEPGMGraphTransaction.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/DFSCodeToEPGMGraphTransaction.java
index 0376f4c0a4b9..de62029c7f37 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/DFSCodeToEPGMGraphTransaction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/DFSCodeToEPGMGraphTransaction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/EPGMGraphTransactionToLabeledGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/EPGMGraphTransactionToLabeledGraph.java
index 1e4287e40ce5..1c7c4a1ba846 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/EPGMGraphTransactionToLabeledGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/EPGMGraphTransactionToLabeledGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/package-info.java
index d01b0a7ebba8..faf8a26770fc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/conversion/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/CompressPattern.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/CompressPattern.java
index 72c4094a89a1..329e9b9a3110 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/CompressPattern.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/CompressPattern.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/CreateCollector.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/CreateCollector.java
index 38d2c04ef52b..9f065d2037b8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/CreateCollector.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/CreateCollector.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/ExpandFrequentPatterns.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/ExpandFrequentPatterns.java
index 0679028c3c39..da9178c533d2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/ExpandFrequentPatterns.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/ExpandFrequentPatterns.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/Frequent.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/Frequent.java
index cc1ee752753e..c4227f722795 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/Frequent.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/Frequent.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/GrowFrequentPatterns.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/GrowFrequentPatterns.java
index f303e16286d6..c1d60b04e02c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/GrowFrequentPatterns.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/GrowFrequentPatterns.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/InitSingleEdgePatternEmbeddingsMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/InitSingleEdgePatternEmbeddingsMap.java
index 441fb0b5a96c..8456736e0a02 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/InitSingleEdgePatternEmbeddingsMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/InitSingleEdgePatternEmbeddingsMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/IsFrequentPatternCollector.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/IsFrequentPatternCollector.java
index 22fe721ddedb..d5da9fba360d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/IsFrequentPatternCollector.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/IsFrequentPatternCollector.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/NotObsolete.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/NotObsolete.java
index e42533077187..4dd9a57a6efb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/NotObsolete.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/NotObsolete.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/ReportSupportedPatterns.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/ReportSupportedPatterns.java
index ea57c57be321..a250b4ec220e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/ReportSupportedPatterns.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/ReportSupportedPatterns.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/VerifyPattern.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/VerifyPattern.java
index 78955728b1bb..a0de73f76f69 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/VerifyPattern.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/VerifyPattern.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/package-info.java
index 00e1318c9d54..ac1383b713e3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/mining/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/package-info.java
index 33660a37142f..61f37e620926 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/AggregateMultipleFunctions.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/AggregateMultipleFunctions.java
index 58229e3d62cd..ba5b160bcdc2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/AggregateMultipleFunctions.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/AggregateMultipleFunctions.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/CreateDictionary.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/CreateDictionary.java
index b6ab5fea9c8a..7f7135272a20 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/CreateDictionary.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/CreateDictionary.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/EncodeAndPruneEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/EncodeAndPruneEdges.java
index b5781d143a85..830bfbcc1a15 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/EncodeAndPruneEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/EncodeAndPruneEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/EncodeAndPruneVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/EncodeAndPruneVertices.java
index f3766ad968e8..bd0d1a55a151 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/EncodeAndPruneVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/EncodeAndPruneVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/MinFrequency.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/MinFrequency.java
index 4ca12b7ecffb..45469a06678c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/MinFrequency.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/MinFrequency.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/NotEmpty.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/NotEmpty.java
index 8351c5c54ec3..828598d0f058 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/NotEmpty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/NotEmpty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/ReportEdgeLabels.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/ReportEdgeLabels.java
index 4d6ef363327b..0749ab8ce1be 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/ReportEdgeLabels.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/ReportEdgeLabels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/ReportVertexLabels.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/ReportVertexLabels.java
index a401fc6a2433..4f2becd16ad5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/ReportVertexLabels.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/ReportVertexLabels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/package-info.java
index c03d71565e2d..40426d54193c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/functions/preprocessing/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/DirectedGSpanLogic.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/DirectedGSpanLogic.java
index f5b725872918..a3d4339426cb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/DirectedGSpanLogic.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/DirectedGSpanLogic.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/GSpanLogic.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/GSpanLogic.java
index ea83b307cb60..58e7f39142df 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/GSpanLogic.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/GSpanLogic.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/GSpanLogicBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/GSpanLogicBase.java
index e1601a8ddd7b..a996b198c044 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/GSpanLogicBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/GSpanLogicBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/UndirectedGSpanLogic.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/UndirectedGSpanLogic.java
index a9777e83b741..f817aeff7070 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/UndirectedGSpanLogic.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/UndirectedGSpanLogic.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/package-info.java
index f69c4368ddd6..ae99147ed002 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/gspan/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/DFSCodeUtils.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/DFSCodeUtils.java
index a5521d0a8417..2937582f0f04 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/DFSCodeUtils.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/DFSCodeUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/GraphUtils.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/GraphUtils.java
index 3b531674510c..a27833190fa5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/GraphUtils.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/GraphUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/GraphUtilsBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/GraphUtilsBase.java
index 046ab4853f00..1fd1a922c177 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/GraphUtilsBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/GraphUtilsBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SearchGraphUtils.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SearchGraphUtils.java
index 02df50f75f67..3efce180a948 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SearchGraphUtils.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SearchGraphUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SearchGraphUtilsBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SearchGraphUtilsBase.java
index 7c3acd12ca86..e0f5c84e7e56 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SearchGraphUtilsBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SearchGraphUtilsBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/Simple16Compressor.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/Simple16Compressor.java
index b1e00d342535..68af2e7b8a4c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/Simple16Compressor.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/Simple16Compressor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SortedSearchGraphUtils.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SortedSearchGraphUtils.java
index ccdba5790e8e..5062587e0ca4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SortedSearchGraphUtils.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/SortedSearchGraphUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/UnsortedSearchGraphUtils.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/UnsortedSearchGraphUtils.java
index f1f9bfa6b057..3a4303f6e2cb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/UnsortedSearchGraphUtils.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/UnsortedSearchGraphUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/package-info.java
index 0cad6d53a97d..0e697f59270a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/model/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/package-info.java
index 5c05547fb15c..dbbe84d5f809 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/GraphWithPatternEmbeddingsMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/GraphWithPatternEmbeddingsMap.java
index 531f3c24b3dd..8947ef1b0e2d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/GraphWithPatternEmbeddingsMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/GraphWithPatternEmbeddingsMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/LabeledGraphIntString.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/LabeledGraphIntString.java
index 7fd5d4d1e6c8..139daecc416b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/LabeledGraphIntString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/LabeledGraphIntString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/LabeledGraphStringString.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/LabeledGraphStringString.java
index 48409a14e4cc..4fae1df484cc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/LabeledGraphStringString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/LabeledGraphStringString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/PatternEmbeddingsMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/PatternEmbeddingsMap.java
index a249fe5fdcad..093ad3d5e26c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/PatternEmbeddingsMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/PatternEmbeddingsMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/package-info.java
index 8d4105050cf2..b017a74367f3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/dimspan/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/package-info.java
index 403a9b0eca47..c589a61ebd36 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/CategoryCharacteristicSubgraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/CategoryCharacteristicSubgraphs.java
index cc2f199fe526..064cdff1ec3d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/CategoryCharacteristicSubgraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/CategoryCharacteristicSubgraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/ThinkLikeAnEmbeddingTFSM.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/ThinkLikeAnEmbeddingTFSM.java
index 09bed9f3a4bf..f1e09b4f71d7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/ThinkLikeAnEmbeddingTFSM.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/ThinkLikeAnEmbeddingTFSM.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/FSMConfig.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/FSMConfig.java
index 9b54c5445dcf..f56d35e6ab56 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/FSMConfig.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/FSMConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/TFSMConstants.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/TFSMConstants.java
index aaa30fa96766..9243f1493c57 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/TFSMConstants.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/TFSMConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/DropPropertiesAndGraphContainment.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/DropPropertiesAndGraphContainment.java
index 8451e8b2696f..6ecde39231af 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/DropPropertiesAndGraphContainment.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/DropPropertiesAndGraphContainment.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/EdgeLabels.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/EdgeLabels.java
index 0979a46603f0..4c6a8181cecb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/EdgeLabels.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/EdgeLabels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/FilterEdgesByLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/FilterEdgesByLabel.java
index 41a9a569b78c..d16b2c59fcdf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/FilterEdgesByLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/FilterEdgesByLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/FilterVerticesByLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/FilterVerticesByLabel.java
index b57b3858fb77..e156c2eca322 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/FilterVerticesByLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/FilterVerticesByLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/NotEmpty.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/NotEmpty.java
index 6fc1a47c39ea..c47f2170b0d2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/NotEmpty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/NotEmpty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/SortedDictionary.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/SortedDictionary.java
index c40b70ff5854..cc3d8522b92e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/SortedDictionary.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/SortedDictionary.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/ToDirectedAdjacencyList.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/ToDirectedAdjacencyList.java
index 7c333100e0e6..4331b2e51a97 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/ToDirectedAdjacencyList.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/ToDirectedAdjacencyList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/ToUndirectedAdjacencyList.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/ToUndirectedAdjacencyList.java
index 322c78935b4e..8ab8887761d9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/ToUndirectedAdjacencyList.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/ToUndirectedAdjacencyList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/VertexLabels.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/VertexLabels.java
index 71b642b007dc..28dd04fd87af 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/VertexLabels.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/VertexLabels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/package-info.java
index bac708847e6a..0d41321bb407 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/package-info.java
index d04a4f316dac..81f62da90ae3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/common/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/package-info.java
index b39ca4ef2d8b..3eb823a0f647 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/ThinkLikeAnEmbeddingFSMBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/ThinkLikeAnEmbeddingFSMBase.java
index db6140a67d8e..37add84e38a4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/ThinkLikeAnEmbeddingFSMBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/ThinkLikeAnEmbeddingFSMBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/TransactionalFSMBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/TransactionalFSMBase.java
index 1811d168800d..0dfb427f2427 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/TransactionalFSMBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/TransactionalFSMBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/canonicalization/CanonicalLabeler.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/canonicalization/CanonicalLabeler.java
index c23b8c0f5e50..fa4186236bea 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/canonicalization/CanonicalLabeler.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/canonicalization/CanonicalLabeler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/canonicalization/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/canonicalization/package-info.java
index 2a9d67239b00..0803eedd7182 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/canonicalization/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/canonicalization/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSingleEdgeEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSingleEdgeEmbeddings.java
index 2a4f320ecc87..4267b06c0b8f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSingleEdgeEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSingleEdgeEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSubgraphDecoder.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSubgraphDecoder.java
index 37ed86c6a5bd..e0af77c32f41 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSubgraphDecoder.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSubgraphDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSubgraphOnly.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSubgraphOnly.java
index ded4ed93bbf4..19d27dbb5e87 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSubgraphOnly.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSSubgraphOnly.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSWrapInSubgraphEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSWrapInSubgraphEmbeddings.java
index 6a6e63f9b336..c029a1a848ba 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSWrapInSubgraphEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CCSWrapInSubgraphEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryEdgeLabels.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryEdgeLabels.java
index 63362e6425b7..5b09a08a9ad9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryEdgeLabels.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryEdgeLabels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryFrequent.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryFrequent.java
index fd3c2b0d17b2..b5dc5cd4784d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryFrequent.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryFrequent.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryFrequentAndInteresting.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryFrequentAndInteresting.java
index e0d3c852799e..9d3251859024 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryFrequentAndInteresting.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryFrequentAndInteresting.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryGraphCounts.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryGraphCounts.java
index 016a965284c1..d9b3b27dbe64 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryGraphCounts.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryGraphCounts.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryMinFrequencies.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryMinFrequencies.java
index bd8e665e84d4..bd612e0bf5d8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryMinFrequencies.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryMinFrequencies.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryVertexLabels.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryVertexLabels.java
index e0b20ce24d20..0abb26c2ea05 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryVertexLabels.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryVertexLabels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryWithCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryWithCount.java
index 032493e2a009..06e658b69a6c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryWithCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/CategoryWithCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/GraphId.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/GraphId.java
index a88051506b45..e196328d5e73 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/GraphId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/GraphId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/IsCharacteristic.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/IsCharacteristic.java
index 6b3c07a1e9a3..8c07580a36b5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/IsCharacteristic.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/IsCharacteristic.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/IsResult.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/IsResult.java
index 89b11c22d120..91b208a8a945 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/IsResult.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/IsResult.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/JoinEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/JoinEmbeddings.java
index 1c8dde6874f4..ed8f3d00380c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/JoinEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/JoinEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/LabelOnly.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/LabelOnly.java
index 871fc0befa9c..26748c401635 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/LabelOnly.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/LabelOnly.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MergeEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MergeEmbeddings.java
index 7b88f7360746..95b83a9f3d27 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MergeEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MergeEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MinEdgeCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MinEdgeCount.java
index f1f6235c12c8..b5efd4d36f06 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MinEdgeCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MinEdgeCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MinFrequency.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MinFrequency.java
index 7230ffbf22c3..ef146327e7f0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MinFrequency.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/MinFrequency.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/SingleEdgeEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/SingleEdgeEmbeddings.java
index d2e92fe7db78..c9ae61ea12ad 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/SingleEdgeEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/SingleEdgeEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/SubgraphDecoder.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/SubgraphDecoder.java
index 84babbd845f7..2f64cf042770 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/SubgraphDecoder.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/SubgraphDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSingleEdgeEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSingleEdgeEmbeddings.java
index 0c3fb5f5c7a7..caed9ffb929d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSingleEdgeEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSingleEdgeEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSubgraphDecoder.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSubgraphDecoder.java
index 5477e18404b6..8b67ee186936 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSubgraphDecoder.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSubgraphDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSubgraphOnly.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSubgraphOnly.java
index de8cf3953adf..e45002778901 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSubgraphOnly.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMSubgraphOnly.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMWrapInSubgraphEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMWrapInSubgraphEmbeddings.java
index a6f7d9c42c40..2769234e70b6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMWrapInSubgraphEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/TFSMWrapInSubgraphEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToCCSGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToCCSGraph.java
index 3b017ef0b779..c48a7f0232e5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToCCSGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToCCSGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToFSMGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToFSMGraph.java
index 0618a4599797..6f64bffd05ec 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToFSMGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToFSMGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToTFSMGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToTFSMGraph.java
index e64b710c7aca..923537aa64ae 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToTFSMGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/ToTFSMGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/WithoutInfrequentEdgeLabels.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/WithoutInfrequentEdgeLabels.java
index 4144e3c1205f..3d7c92ce46c2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/WithoutInfrequentEdgeLabels.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/WithoutInfrequentEdgeLabels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/WithoutInfrequentVertexLabels.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/WithoutInfrequentVertexLabels.java
index 8e62dd175a25..4e301f0be10b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/WithoutInfrequentVertexLabels.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/WithoutInfrequentVertexLabels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/package-info.java
index 521ece1e6af0..e4d2d0973171 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/interestingness/Interestingness.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/interestingness/Interestingness.java
index cd65918f9c77..bd31da2666c4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/interestingness/Interestingness.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/interestingness/Interestingness.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/interestingness/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/interestingness/package-info.java
index 338551635bf6..422d2bda684a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/interestingness/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/interestingness/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/package-info.java
index 21f9e4f999b4..2f8559f726a0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/CCSGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/CCSGraph.java
index fc8b253489d0..abb701106058 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/CCSGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/CCSGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/Embedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/Embedding.java
index 9d5e5548bdb0..bee1677e2873 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/Embedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/Embedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/FSMEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/FSMEdge.java
index 44ae624b9d93..9db6bd29d239 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/FSMEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/FSMEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/FSMGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/FSMGraph.java
index 7605705c2b8c..98364e03c5b1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/FSMGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/FSMGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/TFSMGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/TFSMGraph.java
index a2567fd59847..99affc3723fe 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/TFSMGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/TFSMGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/package-info.java
index 7321c33a563a..6ffdc8771bb7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/pojos/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CCSSubgraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CCSSubgraph.java
index 64f35b1366f1..4e6caa559652 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CCSSubgraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CCSSubgraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CCSSubgraphEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CCSSubgraphEmbeddings.java
index 082882240f13..14198f962d45 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CCSSubgraphEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CCSSubgraphEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/Categorizable.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/Categorizable.java
index d7b90273aaa6..65ef6116a228 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/Categorizable.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/Categorizable.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CategoryCountableLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CategoryCountableLabel.java
index 631a2ddf1d78..6cea5c5083ba 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CategoryCountableLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/CategoryCountableLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/Subgraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/Subgraph.java
index 81f07effd7d6..706d41ce3c6e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/Subgraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/Subgraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/SubgraphEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/SubgraphEmbeddings.java
index 87b2bd2803b8..2227a2f80d79 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/SubgraphEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/SubgraphEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/TFSMSubgraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/TFSMSubgraph.java
index a91138989e4b..eaa4e7b4bd55 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/TFSMSubgraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/TFSMSubgraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/TFSMSubgraphEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/TFSMSubgraphEmbeddings.java
index 7fee168b69f6..9bc95519e006 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/TFSMSubgraphEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/TFSMSubgraphEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/package-info.java
index de78d92b4a21..e80e9fc49745 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/fsm/transactional/tle/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/BaseGellyAlgorithm.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/BaseGellyAlgorithm.java
index 1e4378043360..288ea8f63a15 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/BaseGellyAlgorithm.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/BaseGellyAlgorithm.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/GradoopGellyAlgorithm.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/GradoopGellyAlgorithm.java
index f29cb33fb930..ff7e83d81d31 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/GradoopGellyAlgorithm.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/GradoopGellyAlgorithm.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/ClusteringCoefficientBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/ClusteringCoefficientBase.java
index caf873277471..fca687a1a91b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/ClusteringCoefficientBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/ClusteringCoefficientBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientDirected.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientDirected.java
index a32b1967c2fe..1ac5909994e9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientDirected.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientDirected.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientUndirected.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientUndirected.java
index 514142f01c38..d0f2d95fae9f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientUndirected.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientUndirected.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientDirected.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientDirected.java
index 8f8e5cae9224..a0ed6f9bb6bd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientDirected.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientDirected.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientUndirected.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientUndirected.java
index bca9879038ce..49194d8b39ba 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientUndirected.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientUndirected.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalCCResultTupleToVertexJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalCCResultTupleToVertexJoin.java
index 1918d7a1beba..f961951c2ea4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalCCResultTupleToVertexJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalCCResultTupleToVertexJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalDirectedCCResultToTupleMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalDirectedCCResultToTupleMap.java
index d851ed606452..e6e687895d91 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalDirectedCCResultToTupleMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalDirectedCCResultToTupleMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalUndirectedCCResultToTupleMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalUndirectedCCResultToTupleMap.java
index 708ae4efdb53..e42c38df9896 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalUndirectedCCResultToTupleMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/LocalUndirectedCCResultToTupleMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/package-info.java
index e194d46b98fc..aee7fdfdc553 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/package-info.java
index f7c6e0b090de..d24223372510 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/AnnotateWeaklyConnectedComponents.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/AnnotateWeaklyConnectedComponents.java
index a3c5fe3de9e7..78ccc21f24fd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/AnnotateWeaklyConnectedComponents.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/AnnotateWeaklyConnectedComponents.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/ValueWeaklyConnectedComponents.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/ValueWeaklyConnectedComponents.java
index 13248f77d0b2..e6bc48af486b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/ValueWeaklyConnectedComponents.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/ValueWeaklyConnectedComponents.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/WeaklyConnectedComponentsAsCollection.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/WeaklyConnectedComponentsAsCollection.java
index b275f3611efa..bf1ab10f9763 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/WeaklyConnectedComponentsAsCollection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/WeaklyConnectedComponentsAsCollection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/CreateLongSourceIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/CreateLongSourceIds.java
index 98f2702a3e40..78e8492887fa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/CreateLongSourceIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/CreateLongSourceIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/CreateLongTargetIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/CreateLongTargetIds.java
index 2edfba5d212c..45eacc302487 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/CreateLongTargetIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/CreateLongTargetIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/GellyVertexValueToVertexPropertyJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/GellyVertexValueToVertexPropertyJoin.java
index 3e6b887c9ac5..25967be77c47 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/GellyVertexValueToVertexPropertyJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/GellyVertexValueToVertexPropertyJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/MapVertexIdComponentId.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/MapVertexIdComponentId.java
index c7b2c7e11b07..5f5cbac6aba0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/MapVertexIdComponentId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/MapVertexIdComponentId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/VertexPropertyToEdgePropertyJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/VertexPropertyToEdgePropertyJoin.java
index ccd5e93f3f7a..81c517b77ea3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/VertexPropertyToEdgePropertyJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/VertexPropertyToEdgePropertyJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/package-info.java
index ca8ceab26c34..4dd686e18b90 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/package-info.java
index 828d81d8e75e..83627b6c62b2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdge.java
index 3a4b97e582fe..92e425d4e67e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithDouble.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithDouble.java
index 5845e2ef530e..ec138d5db258 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithDouble.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithDouble.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithNullValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithNullValue.java
index 861a93ef95b2..72482e781622 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithNullValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithNullValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithPropertyValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithPropertyValue.java
index 7260fc00350e..de2ff9ed66a3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithPropertyValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/EdgeToGellyEdgeWithPropertyValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/ElementToGellyEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/ElementToGellyEdge.java
index df194a84934a..a999758109d3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/ElementToGellyEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/ElementToGellyEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/ElementToGellyVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/ElementToGellyVertex.java
index 9886f8efc65e..f5162a908986 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/ElementToGellyVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/ElementToGellyVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/LongTupleToGellyEdgeWithLongValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/LongTupleToGellyEdgeWithLongValue.java
index 952778d8c830..f247fa64f6be 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/LongTupleToGellyEdgeWithLongValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/LongTupleToGellyEdgeWithLongValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/LongTupleToGellyVertexWithLongValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/LongTupleToGellyVertexWithLongValue.java
index bb4ab180f61b..f88ab412613a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/LongTupleToGellyVertexWithLongValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/LongTupleToGellyVertexWithLongValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertex.java
index e4ffeba84291..bb7a12dc1348 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithGradoopId.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithGradoopId.java
index ed337b833463..94d64c02e2c6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithGradoopId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithGradoopId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithNullValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithNullValue.java
index 164e37762852..bec7579dbf32 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithNullValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithNullValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithPropertyValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithPropertyValue.java
index 8adb7714c99c..010f9a395c2e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithPropertyValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/VertexToGellyVertexWithPropertyValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/WritePropertyToGraphHeadMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/WritePropertyToGraphHeadMap.java
index 39513a98c883..f4700314a139 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/WritePropertyToGraphHeadMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/WritePropertyToGraphHeadMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/package-info.java
index c67eea13cd10..eb615fdb668b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/HITS.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/HITS.java
index 9837aad61f2a..b80662da01a6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/HITS.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/HITS.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/HITSToAttributes.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/HITSToAttributes.java
index e443a934a18f..0e8e276626d1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/HITSToAttributes.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/HITSToAttributes.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/HitsResultKeySelector.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/HitsResultKeySelector.java
index e43aefccc259..6ac3f9124eb1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/HitsResultKeySelector.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/HitsResultKeySelector.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/package-info.java
index 42bfd192406b..b5032ebd1bd7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/package-info.java
index 5e48095295f4..025b04a34f43 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/hits/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GellyLabelPropagation.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GellyLabelPropagation.java
index e6c3f23887d6..feaf9f0e0399 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GellyLabelPropagation.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GellyLabelPropagation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GradoopLabelPropagation.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GradoopLabelPropagation.java
index da60e13adf42..1dff97ddc715 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GradoopLabelPropagation.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GradoopLabelPropagation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/LabelPropagation.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/LabelPropagation.java
index c1e259a12078..cbeac2485b6d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/LabelPropagation.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/LabelPropagation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPMessageFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPMessageFunction.java
index 65fe7f771833..88d6849eda23 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPMessageFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPMessageFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPUpdateFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPUpdateFunction.java
index 076f9bf1ec0c..0a2658d13d60 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPUpdateFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPUpdateFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPVertexJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPVertexJoin.java
index 080be479e540..d3206daba03a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPVertexJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/LPVertexJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/package-info.java
index 172a801ee7eb..0615e47c514f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/package-info.java
index ff13de12ba3e..d8f12fe9f6bc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/labelpropagation/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/package-info.java
index f6c7ed956469..6582d1a778e4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/PageRank.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/PageRank.java
index cb0a10a07341..b03620ae9b7a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/PageRank.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/PageRank.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/PageRankResultKey.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/PageRankResultKey.java
index 2e869676bbb8..95ed4c3a9d76 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/PageRankResultKey.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/PageRankResultKey.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/PageRankToAttribute.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/PageRankToAttribute.java
index fab725607129..989df2a93b82 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/PageRankToAttribute.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/PageRankToAttribute.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/package-info.java
index ede4d4b82d4d..1be9ad08699b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/package-info.java
index af091beff073..e6cd655f70b7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/pagerank/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/KRandomJumpGellyVCI.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/KRandomJumpGellyVCI.java
index 1d0479508c5f..1072767a046f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/KRandomJumpGellyVCI.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/KRandomJumpGellyVCI.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/EPGMEdgeWithGellyEdgeIdJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/EPGMEdgeWithGellyEdgeIdJoin.java
index 29746485a586..f0b917238db2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/EPGMEdgeWithGellyEdgeIdJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/EPGMEdgeWithGellyEdgeIdJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GellyVertexWithEPGMVertexJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GellyVertexWithEPGMVertexJoin.java
index 1116ba792043..c5cd0a3b182c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GellyVertexWithEPGMVertexJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GellyVertexWithEPGMVertexJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GellyVertexWithLongIdToGradoopIdJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GellyVertexWithLongIdToGradoopIdJoin.java
index a3d4a885c85c..a90b02855466 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GellyVertexWithLongIdToGradoopIdJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GellyVertexWithLongIdToGradoopIdJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GetVisitedGellyEdgeLongIdsFlatMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GetVisitedGellyEdgeLongIdsFlatMap.java
index 07c2d3cae6ef..d919cad6c4c6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GetVisitedGellyEdgeLongIdsFlatMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GetVisitedGellyEdgeLongIdsFlatMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GetVisitedSourceTargetIdsFlatMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GetVisitedSourceTargetIdsFlatMap.java
index ec2050d9732f..d5875c7230d9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GetVisitedSourceTargetIdsFlatMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/GetVisitedSourceTargetIdsFlatMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdToGellyVertexWithVCIValueMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdToGellyVertexWithVCIValueMap.java
index e88695a38216..0f3e9e1dcd99 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdToGellyVertexWithVCIValueMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdToGellyVertexWithVCIValueMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdTupleToGellyEdgeWithLongValueJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdTupleToGellyEdgeWithLongValueJoin.java
index a90ee63c3d04..c0fa6ebb69d2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdTupleToGellyEdgeWithLongValueJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdTupleToGellyEdgeWithLongValueJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdWithEdgeToTupleJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdWithEdgeToTupleJoin.java
index a44cdba39928..b51892e585a9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdWithEdgeToTupleJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/LongIdWithEdgeToTupleJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/ReplaceTargetWithLongIdJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/ReplaceTargetWithLongIdJoin.java
index b05259ca51fe..9f0f96c026bb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/ReplaceTargetWithLongIdJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/ReplaceTargetWithLongIdJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VCIComputeFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VCIComputeFunction.java
index 552d732079e2..0d4d1acf03f2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VCIComputeFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VCIComputeFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VCIVertexValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VCIVertexValue.java
index f4ab932ea39a..abbaeec5af31 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VCIVertexValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VCIVertexValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VertexWithVisitedSourceTargetIdJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VertexWithVisitedSourceTargetIdJoin.java
index 9eba1fa97d7a..da56d3a66f68 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VertexWithVisitedSourceTargetIdJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VertexWithVisitedSourceTargetIdJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VisitedGellyEdgesWithLongIdToGradoopIdJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VisitedGellyEdgesWithLongIdToGradoopIdJoin.java
index ad54c89faf55..a48d59f0a24e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VisitedGellyEdgesWithLongIdToGradoopIdJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/VisitedGellyEdgesWithLongIdToGradoopIdJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/package-info.java
index cc3b00d604ba..728c1e8476c3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/package-info.java
index 257ab85e0832..b75e98fd2090 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/randomjump/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/SingleSourceShortestPaths.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/SingleSourceShortestPaths.java
index 9b19ec1f82cb..4110500e0d9e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/SingleSourceShortestPaths.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/SingleSourceShortestPaths.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/functions/SingleSourceShortestPathsAttribute.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/functions/SingleSourceShortestPathsAttribute.java
index a0c4f3108298..40a73293f9fb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/functions/SingleSourceShortestPathsAttribute.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/functions/SingleSourceShortestPathsAttribute.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/functions/package-info.java
index dfcb538df3ff..7b1104f35db7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/package-info.java
index 01055464657e..a7d3f15f2785 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/shortestpaths/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/trianglecounting/GellyTriangleCounting.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/trianglecounting/GellyTriangleCounting.java
index 1ccabee0cbc3..7cba1ef47373 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/trianglecounting/GellyTriangleCounting.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/trianglecounting/GellyTriangleCounting.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/trianglecounting/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/trianglecounting/package-info.java
index 41b89fc8f204..f6902652bd90 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/trianglecounting/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/trianglecounting/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/DistinctVertexDegrees.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/DistinctVertexDegrees.java
index 5cb8f3a87c48..649048448a5c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/DistinctVertexDegrees.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/DistinctVertexDegrees.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/functions/DistinctVertexDegreesToAttribute.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/functions/DistinctVertexDegreesToAttribute.java
index ebad16321fcb..c99a68c79855 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/functions/DistinctVertexDegreesToAttribute.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/functions/DistinctVertexDegreesToAttribute.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/functions/package-info.java
index 47381a854350..350e026f5cc6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/package-info.java
index bb75e6525a9f..c2b220b224d1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/package-info.java
index 59ca11c06578..989ec0b96eb5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/algorithms/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/DataSink.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/DataSink.java
index 83b09e17e31b..764b1b40b186 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/DataSink.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/DataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/DataSource.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/DataSource.java
index 6b51ca05af0c..7196293fa520 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/DataSource.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/DataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/MetaDataSink.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/MetaDataSink.java
index e743aa4f0fcb..e99b4e47aea9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/MetaDataSink.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/MetaDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/MetaDataSource.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/MetaDataSource.java
index 64f33be20b03..8f5d14b20039 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/MetaDataSource.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/MetaDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/ElementToPropertyMetaData.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/ElementToPropertyMetaData.java
index 16420ae0b206..0ac3bfb8d728 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/ElementToPropertyMetaData.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/ElementToPropertyMetaData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/ReducePropertyMetaData.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/ReducePropertyMetaData.java
index eb5d821c03af..379c89746491 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/ReducePropertyMetaData.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/ReducePropertyMetaData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/package-info.java
index 29aa222d47fb..0361b87c2f8b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/package-info.java
index 96e4c8e001fd..63d1cc39d8c5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/metadata/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/package-info.java
index a395cb8bb4f0..872164174a6c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/api/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVBase.java
index fab23852649c..428c42d0beac 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVConstants.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVConstants.java
index 4e68bbedb5f1..9fb59672b382 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVConstants.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVDataSink.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVDataSink.java
index 00b73222319b..c72a962e7a0e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVDataSink.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVDataSource.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVDataSource.java
index 12fe93582310..711af3b77660 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVDataSource.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/CSVDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToEdge.java
index d5f6169965ed..bb5f68d1bce1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToElement.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToElement.java
index 4f8fa4878f56..4adb65ac5cbf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToElement.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToGraphHead.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToGraphHead.java
index b85d42017935..c65a69cbc3a9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToGraphHead.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToVertex.java
index 1bcef15e366d..1cbd9b6e94bb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/CSVLineToVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/EdgeToCSVEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/EdgeToCSVEdge.java
index 0e411a19ef43..e301753a80e6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/EdgeToCSVEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/EdgeToCSVEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/ElementToCSV.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/ElementToCSV.java
index 84731f3ffc28..48edddf945e6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/ElementToCSV.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/ElementToCSV.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/GraphHeadToCSVGraphHead.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/GraphHeadToCSVGraphHead.java
index 2ef3ddf9b2bd..ffba5af62e23 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/GraphHeadToCSVGraphHead.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/GraphHeadToCSVGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/StringEscaper.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/StringEscaper.java
index bcce78b0a992..3b9c60cfd45a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/StringEscaper.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/StringEscaper.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/VertexToCSVVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/VertexToCSVVertex.java
index bb54236f8d84..a9baf7ccf653 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/VertexToCSVVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/VertexToCSVVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/package-info.java
index 05cb13d62e71..910735fb68b1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSink.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSink.java
index 0458625b4cf5..1cfcb755f3bc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSink.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSource.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSource.java
index 82a3d1619a70..5fdf43f9d460 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSource.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/IndexedCSVFileFormat.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/IndexedCSVFileFormat.java
index 582cf226c60b..692ab7c436a1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/IndexedCSVFileFormat.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/IndexedCSVFileFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/MultipleFileOutputFormat.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/MultipleFileOutputFormat.java
index 78de23277d13..759382298433 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/MultipleFileOutputFormat.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/MultipleFileOutputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/package-info.java
index 702b73bf1f62..4037bce583a8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/package-info.java
index ad105a2749bd..e948c57a07df 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/indexed/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaData.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaData.java
index 02db8c796c24..c374ae36578d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaData.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataParser.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataParser.java
index b2044e51ed33..7f197507a661 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataParser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataParser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataSink.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataSink.java
index 6aecb6ff00ef..e5d5fc3ad7b5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataSink.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataSource.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataSource.java
index 2fa4b3298598..503a1533667f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataSource.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/CSVMetaDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/package-info.java
index 340d62773823..a942be794533 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/metadata/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/package-info.java
index 7fb07075f013..a536215b7889 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVEdge.java
index 69f21cde22af..7809b9dc0bbf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVElement.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVElement.java
index a95e47238db8..96e01edfc6ea 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVElement.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVGraphHead.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVGraphHead.java
index 6908774bf4b9..021d92e595cc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVGraphHead.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVVertex.java
index 170a64586568..a9318b781110 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/CSVVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/package-info.java
index 6be22611cdd1..6ba4f015f108 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/csv/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/DOTDataSink.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/DOTDataSink.java
index 62c955cf7c8a..e4b5ea079fdb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/DOTDataSink.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/DOTDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/AbstractDotFileFormat.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/AbstractDotFileFormat.java
index e19feb97aa48..6a51eda73839 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/AbstractDotFileFormat.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/AbstractDotFileFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatHtml.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatHtml.java
index 88017fa62a45..5226f73a13e6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatHtml.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatHtml.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatSimple.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatSimple.java
index c5edd2d3b900..c4b3bdf9ddd2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatSimple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatSimple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/package-info.java
index f9bdd0d02de5..629e6224fa26 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/package-info.java
index 106f5973f03a..47a399d77432 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/dot/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/EdgeListDataSource.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/EdgeListDataSource.java
index 33318095e138..ff467a9ae670 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/EdgeListDataSource.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/EdgeListDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/VertexLabeledEdgeListDataSource.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/VertexLabeledEdgeListDataSource.java
index 9344fbecdf7f..5ea2909fa2ce 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/VertexLabeledEdgeListDataSource.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/VertexLabeledEdgeListDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateImportEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateImportEdge.java
index 1b6736bdb715..226f41c3d162 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateImportEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateImportEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateImportVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateImportVertex.java
index 291d30ed8775..6250e771cb18 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateImportVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateImportVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateLabeledImportVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateLabeledImportVertex.java
index 1484f978c012..8303fd91ae40 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateLabeledImportVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/CreateLabeledImportVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/package-info.java
index 57411d82d536..d302fe232d24 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/package-info.java
index ed1c9025f042..9433b242b981 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/edgelist/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLConsoleOutput.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLConsoleOutput.java
index 4afc6ac69839..70a4ea13cc02 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLConsoleOutput.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLConsoleOutput.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLDataSink.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLDataSink.java
index 13664b1234f7..68435d7f78bb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLDataSink.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLEncoder.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLEncoder.java
index 1f201fdca768..14b1f76456fe 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLEncoder.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/GDLEncoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/functions/GraphTransactionsToGDL.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/functions/GraphTransactionsToGDL.java
index 6ecbaa54bb83..199029e7854f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/functions/GraphTransactionsToGDL.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/functions/GraphTransactionsToGDL.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/functions/package-info.java
index bfe30e49daf6..6db5ab3c4b40 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/package-info.java
index f5eccf899bce..16340843c281 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/gdl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/GraphDataSource.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/GraphDataSource.java
index e07829abad24..e74b4c95340f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/GraphDataSource.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/GraphDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitEdge.java
index 615d7ea679a9..50c26709691c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitElement.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitElement.java
index ffdcce690bd8..537cd0e834e0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitElement.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitVertex.java
index ea540f5af162..d1cf08f0d485 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/InitVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/UpdateEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/UpdateEdge.java
index 4e245929db3c..b2a0ece2dc85 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/UpdateEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/UpdateEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/package-info.java
index 6a061cc28f78..a04ea58f8784 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/package-info.java
index 0400e536fa6b..9846b01cb0ff 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/ImportEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/ImportEdge.java
index c5607e0ae758..87780ca8e804 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/ImportEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/ImportEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/ImportVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/ImportVertex.java
index f2742fae9646..9582a54f3802 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/ImportVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/ImportVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/package-info.java
index a8a999bd2959..6407d18ed8da 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/graph/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/package-info.java
index e6d9685c8c24..bcb7913ecb04 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/statistics/GraphStatisticsDataSink.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/statistics/GraphStatisticsDataSink.java
index a0baf99445a3..85d41e57d4e3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/statistics/GraphStatisticsDataSink.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/statistics/GraphStatisticsDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/statistics/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/statistics/package-info.java
index dc1e443966c4..02cba58e8d77 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/statistics/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/statistics/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFBase.java
index 3b7da55fffb4..34c438de9742 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFConstants.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFConstants.java
index 7c3fd4072a30..89a0843961aa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFConstants.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFDataSink.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFDataSink.java
index df0238791c56..15b9df44aa81 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFDataSink.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFDataSource.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFDataSource.java
index b5270eb39d0c..4ed2186ccfcd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFDataSource.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/TLFDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/constants/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/constants/package-info.java
index bfe2d8cba462..4ab97313333b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/constants/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/constants/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/Dictionary.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/Dictionary.java
index b4b582b0499b..d0dd56264637 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/Dictionary.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/Dictionary.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/DictionaryEntry.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/DictionaryEntry.java
index 9300d7f54b04..0e028cff392c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/DictionaryEntry.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/DictionaryEntry.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/EdgeLabelDecoder.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/EdgeLabelDecoder.java
index c3789d0d9a83..29eeffff74b3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/EdgeLabelDecoder.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/EdgeLabelDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/EdgeLabelList.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/EdgeLabelList.java
index 9365c0eee9b5..32b99568d883 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/EdgeLabelList.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/EdgeLabelList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/ElementLabelEncoder.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/ElementLabelEncoder.java
index e2315f43b187..0c5ea11d3e1c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/ElementLabelEncoder.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/ElementLabelEncoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/GraphTransactionFromText.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/GraphTransactionFromText.java
index 0a4be4012132..f9cd669fc6c1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/GraphTransactionFromText.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/GraphTransactionFromText.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFDictionaryFileFormat.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFDictionaryFileFormat.java
index 254aaab945ca..f21bfe261ce1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFDictionaryFileFormat.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFDictionaryFileFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFDictionaryMapGroupReducer.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFDictionaryMapGroupReducer.java
index 8cce79166f5c..436b4b63087f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFDictionaryMapGroupReducer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFDictionaryMapGroupReducer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFFileFormat.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFFileFormat.java
index cd161b8e6c14..a7d3ef9790ac 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFFileFormat.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/TLFFileFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/VertexLabelDecoder.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/VertexLabelDecoder.java
index 38bf52ceb350..7c236297d019 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/VertexLabelDecoder.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/VertexLabelDecoder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/VertexLabelList.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/VertexLabelList.java
index 0bc8e83b463c..7f67c85af2eb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/VertexLabelList.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/VertexLabelList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/package-info.java
index 6279a3e9859f..903f2eb9efca 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/TLFInputFormat.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/TLFInputFormat.java
index 9ba860e2a696..343db7b1122b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/TLFInputFormat.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/TLFInputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/TLFRecordReader.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/TLFRecordReader.java
index 21db65cc0ce6..b91f0aebb763 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/TLFRecordReader.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/TLFRecordReader.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/package-info.java
index 4f405d8a3686..07b0bf489036 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/inputformats/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/package-info.java
index a5b7a06e7608..f6632ce35761 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/io/impl/tlf/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraph.java
index 998dc25a1ee7..46688ecab0ec 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollection.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollection.java
index 195c4cab69af..fc02f68eda53 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollectionFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollectionFactory.java
index 88f973d84d85..d3fa1527cacf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollectionFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollectionFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollectionOperators.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollectionOperators.java
index 9021177b7273..30bbf000249f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollectionOperators.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphCollectionOperators.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphFactory.java
index 89b8e472b758..d2bd082bd279 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphOperators.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphOperators.java
index 850112195824..be1e1c1b57af 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphOperators.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/BaseGraphOperators.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/GraphCollectionOperators.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/GraphCollectionOperators.java
index d200e00adb77..e68a2bb68c28 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/GraphCollectionOperators.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/GraphCollectionOperators.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/LogicalGraphOperators.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/LogicalGraphOperators.java
index 69e605ae9545..338d400d0127 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/LogicalGraphOperators.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/LogicalGraphOperators.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/package-info.java
index 84f56374913e..bbffda6a09d8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/epgm/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/AggregateDefaultValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/AggregateDefaultValue.java
index 76efcc4e0a32..e79982b0934f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/AggregateDefaultValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/AggregateDefaultValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/AggregateFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/AggregateFunction.java
index ccadb18e1730..4741c7f1e8c5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/AggregateFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/AggregateFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/EdgeAggregateFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/EdgeAggregateFunction.java
index 27acccf59a9e..889b6430ba76 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/EdgeAggregateFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/EdgeAggregateFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/Function.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/Function.java
index df6f1137d75e..860d40a62f33 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/Function.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/Function.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/GraphHeadReduceFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/GraphHeadReduceFunction.java
index 0ebfb6be35b6..ae7c57f0f0da 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/GraphHeadReduceFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/GraphHeadReduceFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/KeyFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/KeyFunction.java
index 9eceb7663a25..25ff8682d720 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/KeyFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/KeyFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/KeyFunctionWithDefaultValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/KeyFunctionWithDefaultValue.java
index e3cb4275c2a2..f5ce538c406c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/KeyFunctionWithDefaultValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/KeyFunctionWithDefaultValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/TransformationFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/TransformationFunction.java
index cf272101f4bb..6ae6230ccbee 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/TransformationFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/TransformationFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/VertexAggregateFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/VertexAggregateFunction.java
index 009ae4777df0..9a9e630f4133 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/VertexAggregateFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/VertexAggregateFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/package-info.java
index f1749927ded5..6df61dc4c286 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/BaseLayoutFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/BaseLayoutFactory.java
index d1e5ce63a673..fd27290aec30 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/BaseLayoutFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/BaseLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/GraphCollectionLayout.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/GraphCollectionLayout.java
index c04c0e1360d8..dc490b081011 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/GraphCollectionLayout.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/GraphCollectionLayout.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/GraphCollectionLayoutFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/GraphCollectionLayoutFactory.java
index 0d9513eed8b3..5f41b1962918 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/GraphCollectionLayoutFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/GraphCollectionLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/Layout.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/Layout.java
index c9a693e73cb5..5936f5c3789a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/Layout.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/Layout.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/LogicalGraphLayout.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/LogicalGraphLayout.java
index 620fc8b8354e..85402df88a79 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/LogicalGraphLayout.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/LogicalGraphLayout.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/LogicalGraphLayoutFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/LogicalGraphLayoutFactory.java
index fd99ac386916..6033dad2c9d6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/LogicalGraphLayoutFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/LogicalGraphLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/package-info.java
index d86ee458aa05..8a76292eb086 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/layouts/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/ApplicableUnaryBaseGraphToBaseGraphOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/ApplicableUnaryBaseGraphToBaseGraphOperator.java
index 9d1594425ca7..b23fb42dbf58 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/ApplicableUnaryBaseGraphToBaseGraphOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/ApplicableUnaryBaseGraphToBaseGraphOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphCollectionToBaseGraphCollectionOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphCollectionToBaseGraphCollectionOperator.java
index 89e1fd99959a..1536d0fe8136 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphCollectionToBaseGraphCollectionOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphCollectionToBaseGraphCollectionOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphCollectionToValueOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphCollectionToValueOperator.java
index 56bb0316c9a0..f39f999f19c8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphCollectionToValueOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphCollectionToValueOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphToBaseGraphOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphToBaseGraphOperator.java
index 2d28f3237974..f92edaeefe97 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphToBaseGraphOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphToBaseGraphOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphToValueOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphToValueOperator.java
index ffd05405ef89..ddd13e490ebb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphToValueOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/BinaryBaseGraphToValueOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphCollectionGenerator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphCollectionGenerator.java
index fc5ed23ee804..f5ad98a6320d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphCollectionGenerator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphCollectionGenerator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphGenerator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphGenerator.java
index 1449fe24c5e9..688062d5aa50 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphGenerator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphGenerator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphTransactionsGenerator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphTransactionsGenerator.java
index b8b53350b493..9c1177883369 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphTransactionsGenerator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphTransactionsGenerator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphTransactionsOperators.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphTransactionsOperators.java
index d5792d412d3e..a0f026d4f85e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphTransactionsOperators.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphTransactionsOperators.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphsToGraphOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphsToGraphOperator.java
index e0bf2a14bda3..2c2cba748117 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphsToGraphOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/GraphsToGraphOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/Operator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/Operator.java
index 87ede4ed830f..f20b010d8ce2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/Operator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/Operator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/ReducibleBinaryBaseGraphToBaseGraphOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/ReducibleBinaryBaseGraphToBaseGraphOperator.java
index b221fb5ca54c..144f303d71c4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/ReducibleBinaryBaseGraphToBaseGraphOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/ReducibleBinaryBaseGraphToBaseGraphOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToBaseGraphCollectionOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToBaseGraphCollectionOperator.java
index f0054c304e70..d838d85a1e50 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToBaseGraphCollectionOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToBaseGraphCollectionOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToBaseGraphOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToBaseGraphOperator.java
index c36abe471820..31bb7d581f33 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToBaseGraphOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToBaseGraphOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToValueOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToValueOperator.java
index edd537f23f9e..d5032fd2b77a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToValueOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphCollectionToValueOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToBaseGraphCollectionOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToBaseGraphCollectionOperator.java
index 32444fd19652..a9b24226ca5e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToBaseGraphCollectionOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToBaseGraphCollectionOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToBaseGraphOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToBaseGraphOperator.java
index b4d9d8ac728c..4fc43f7e677d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToBaseGraphOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToBaseGraphOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToValueOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToValueOperator.java
index 2927afadd5c0..74e91c3dfaac 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToValueOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryBaseGraphToValueOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryCollectionToCollectionOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryCollectionToCollectionOperator.java
index 693a14243e18..1bf9065b1e26 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryCollectionToCollectionOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryCollectionToCollectionOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToCollectionOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToCollectionOperator.java
index 3e70ee77b002..bf40d135b940 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToCollectionOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToCollectionOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToGraphOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToGraphOperator.java
index 6c1b4cb97c7d..9412f84561ff 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToGraphOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToGraphOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToValueOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToValueOperator.java
index 15e07c446ba2..88733540dffc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToValueOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/UnaryGraphToValueOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/package-info.java
index c54a7c1706de..d9d3a58d6042 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/operators/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/tuples/Countable.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/tuples/Countable.java
index 651bf5d6da3e..00405221c9fd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/tuples/Countable.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/tuples/Countable.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/tuples/package-info.java
index 051a3ea85669..f675d58f6250 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/api/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/api/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/comparators/ElementIdComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/comparators/ElementIdComparator.java
index 5d9d643a6c16..9d8b5e4b8d80 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/comparators/ElementIdComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/comparators/ElementIdComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/comparators/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/comparators/package-info.java
index a059f678757f..68d00951c6ea 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/comparators/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/comparators/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/GraphCollection.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/GraphCollection.java
index 4fda2ebee196..eacc31f2f5b1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/GraphCollection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/GraphCollection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/GraphCollectionFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/GraphCollectionFactory.java
index 0d989fae7704..00fe77debe03 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/GraphCollectionFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/GraphCollectionFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/LogicalGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/LogicalGraph.java
index f574a3715599..29fa9da31cab 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/LogicalGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/LogicalGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/LogicalGraphFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/LogicalGraphFactory.java
index 5ae3ce633321..cdad3743041e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/LogicalGraphFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/LogicalGraphFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/package-info.java
index 273d04a9f6b6..66b59a554264 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/epgm/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/And.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/And.java
index 02c411e5a6c1..c9868bfded3a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/And.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/And.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Equals.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Equals.java
index 5e8c66dc8176..c18dfd67d1ca 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Equals.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Equals.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/False.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/False.java
index 349a4b363a0d..b2128c9e82a6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/False.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/False.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Not.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Not.java
index 13480baba201..1d4f50a71724 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Not.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Not.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Or.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Or.java
index c000b89ff325..3931054aeede 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Or.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/Or.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/True.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/True.java
index a835168cee25..e9f14e54f9f0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/True.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/True.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/package-info.java
index 18546e2e7199..0c26c0713169 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/bool/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByDifferentGraphId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByDifferentGraphId.java
index 102bb6783ec8..801f8f0c4a9e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByDifferentGraphId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByDifferentGraphId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByDifferentId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByDifferentId.java
index 6c6ea9b737fa..94da5eb961d1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByDifferentId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByDifferentId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByLabel.java
index 0728db6c7d97..52d9344391eb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByProperty.java
index 8907cc294d38..ad260da1cb66 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/BySameId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/BySameId.java
index 20801de35cc3..774bc933326b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/BySameId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/BySameId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/BySourceId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/BySourceId.java
index 674d988a859c..5bde343d4410 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/BySourceId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/BySourceId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByTargetId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByTargetId.java
index f9243573ec63..0e69c095027a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByTargetId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ByTargetId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Clone.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Clone.java
index 58a5e2d4a415..6b8848fdfea3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Clone.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Clone.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeFromIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeFromIds.java
index 6f66d00181d5..f690a07c4c20 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeFromIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeFromIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeSourceUpdateJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeSourceUpdateJoin.java
index 7b1d04adeafd..e30e366e1341 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeSourceUpdateJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeSourceUpdateJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeTargetUpdateJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeTargetUpdateJoin.java
index 30ef882dfbd0..0ea6554e4122 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeTargetUpdateJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/EdgeTargetUpdateJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ElementIdUpdater.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ElementIdUpdater.java
index 6e77ee92662d..edecd808d15c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ElementIdUpdater.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ElementIdUpdater.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ElementsOfSelectedGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ElementsOfSelectedGraphs.java
index 3c3349bbc7c5..d2270019ae7f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ElementsOfSelectedGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ElementsOfSelectedGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ExpandGradoopIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ExpandGradoopIds.java
index 1802b9a67359..308b655adfb6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ExpandGradoopIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ExpandGradoopIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementExpander.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementExpander.java
index 517d1f214316..35a956afc2d8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementExpander.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementExpander.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementSet.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementSet.java
index ff137247a136..1c829753ae28 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementSet.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementSet.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementsHeadsToTransaction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementsHeadsToTransaction.java
index f73047297649..feab917a827a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementsHeadsToTransaction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphElementsHeadsToTransaction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphVerticesEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphVerticesEdges.java
index ec758ccd2abd..43b0c424d5f1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphVerticesEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/GraphVerticesEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Id.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Id.java
index 1d92613516ed..f68a74f8c654 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Id.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Id.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdAsIdSet.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdAsIdSet.java
index ddcfc37360ab..5713885d37e6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdAsIdSet.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdAsIdSet.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdInBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdInBroadcast.java
index 40b40f211942..d6ca5e1ad4bc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdInBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdInBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdNotInBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdNotInBroadcast.java
index 46fcbed48a7d..d7885a195a5d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdNotInBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdNotInBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdSetCombiner.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdSetCombiner.java
index c0a8d465c084..da9ba7b2f975 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdSetCombiner.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/IdSetCombiner.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/InitGraphHead.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/InitGraphHead.java
index 24ab958a8fff..eab2a54fee40 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/InitGraphHead.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/InitGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Label.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Label.java
index fb7a4b5c9daf..64c729dff4a1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Label.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Label.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/LabelCombiner.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/LabelCombiner.java
index f1f883aa2b42..b7844f1b9837 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/LabelCombiner.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/LabelCombiner.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/LabelIsIn.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/LabelIsIn.java
index 6189f593544b..f98dfb03e511 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/LabelIsIn.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/LabelIsIn.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/MergedGraphIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/MergedGraphIds.java
index 6ec285bb373f..fe36ad83a685 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/MergedGraphIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/MergedGraphIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairElementWithNewId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairElementWithNewId.java
index 73c668dfa989..24fa0f8638f8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairElementWithNewId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairElementWithNewId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairElementWithPropertyValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairElementWithPropertyValue.java
index b65d7fd2c9cd..107dda372411 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairElementWithPropertyValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairElementWithPropertyValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairTupleWithNewId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairTupleWithNewId.java
index de46ffd5aa6f..63fb671698f8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairTupleWithNewId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PairTupleWithNewId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Properties.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Properties.java
index 0b85fcec7485..8ba9f93255f7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Properties.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Properties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertyGetter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertyGetter.java
index edb0fb250aa7..4e549d0d3b9a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertyGetter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertyGetter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertyRemover.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertyRemover.java
index 66b1d7ddd92d..3506b263ad46 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertyRemover.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertyRemover.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertySetter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertySetter.java
index 55bde7be1e55..cd5ca972ae80 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertySetter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/PropertySetter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RemoveProperties.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RemoveProperties.java
index 811574cdc4ec..0500f2ae8482 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RemoveProperties.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RemoveProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RenameLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RenameLabel.java
index ee245d836711..6ffc4393595e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RenameLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RenameLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RenamePropertyKeys.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RenamePropertyKeys.java
index 07aca4b0deec..75ad9b8227d9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RenamePropertyKeys.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/RenamePropertyKeys.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/SetProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/SetProperty.java
index ea69d648031c..36fe1dfbe17c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/SetProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/SetProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/SourceId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/SourceId.java
index 402c55535908..98a3f38a250c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/SourceId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/SourceId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TargetId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TargetId.java
index 7c65851c8e2c..1edb82958645 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TargetId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TargetId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToGellyEdgeWithNullValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToGellyEdgeWithNullValue.java
index 1fe7237dd4af..a341ea5f5870 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToGellyEdgeWithNullValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToGellyEdgeWithNullValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToGradoopIdSet.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToGradoopIdSet.java
index 46488e252bd3..18debda8afdd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToGradoopIdSet.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToGradoopIdSet.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToPropertyValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToPropertyValue.java
index 5cd315960eb2..2f94b027581d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToPropertyValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/ToPropertyValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionEdges.java
index 2b9b5ed29541..4a5b12862dba 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionFromSets.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionFromSets.java
index d0783ea62a38..b908814f8ef3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionFromSets.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionFromSets.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionGraphHead.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionGraphHead.java
index a4894c69278f..eb5b629355e8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionGraphHead.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionVertices.java
index 93880196c8a8..e2bb82e3a667 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/TransactionVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Tuple1WithId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Tuple1WithId.java
index 918e2f475e04..1c98e770c09a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Tuple1WithId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/Tuple1WithId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/VertexFromId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/VertexFromId.java
index 98338fdea7fe..cfd15f5aad91 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/VertexFromId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/VertexFromId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/package-info.java
index 14c316bb7f1b..6f28a3293828 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/epgm/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/AbstractRichCombinedFilterFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/AbstractRichCombinedFilterFunction.java
index 3504c7048fd7..83a57374396f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/AbstractRichCombinedFilterFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/AbstractRichCombinedFilterFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/And.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/And.java
index 485d7e807af6..e2356312eaf0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/And.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/And.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/CombinableFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/CombinableFilter.java
index 16842df0ed72..ac98beebac55 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/CombinableFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/CombinableFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/Not.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/Not.java
index 1313181f70cf..c46c51f911c0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/Not.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/Not.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/Or.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/Or.java
index da442d46209e..39e7dc2a6fb6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/Or.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/Or.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/package-info.java
index a9cf19a20eff..6ab8cde73fef 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/filters/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/AddToGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/AddToGraph.java
index b2a170576778..34dd28fda0c7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/AddToGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/AddToGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/AddToGraphBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/AddToGraphBroadcast.java
index a4089704aa8c..0c91aa268eb2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/AddToGraphBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/AddToGraphBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/ExpandGraphsToIdSet.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/ExpandGraphsToIdSet.java
index 4e1ee68bd763..c65dcc8e56bc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/ExpandGraphsToIdSet.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/ExpandGraphsToIdSet.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/ExpandGraphsToIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/ExpandGraphsToIds.java
index cd7dd6c57063..9e9244769001 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/ExpandGraphsToIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/ExpandGraphsToIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/GraphContainmentFilterBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/GraphContainmentFilterBroadcast.java
index 492427ba8417..94c818614d68 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/GraphContainmentFilterBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/GraphContainmentFilterBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/GraphsContainmentFilterBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/GraphsContainmentFilterBroadcast.java
index 4f621d6bfa23..bf5b02369b47 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/GraphsContainmentFilterBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/GraphsContainmentFilterBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAllGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAllGraphs.java
index 2c34b35ad847..9c667dddf44d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAllGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAllGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAllGraphsBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAllGraphsBroadcast.java
index ebc953ede5a1..587cadb27aa4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAllGraphsBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAllGraphsBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAnyGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAnyGraph.java
index fbf7cc912209..52ef9b21be7a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAnyGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAnyGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAnyGraphBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAnyGraphBroadcast.java
index 7c156d789407..87a92b474b27 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAnyGraphBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InAnyGraphBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraph.java
index 545e46e2d741..96a3573dee8b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraphBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraphBroadcast.java
index cea840c8213a..b8eb4c0bd0c7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraphBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraphBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraphsBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraphsBroadcast.java
index d41803f5ff20..de80fd5a657e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraphsBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InGraphsBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InNoGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InNoGraph.java
index e8450f5ef08c..8bc21bed7206 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InNoGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/InNoGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/NotInGraphBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/NotInGraphBroadcast.java
index 10884df39dbc..c4a920527c66 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/NotInGraphBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/NotInGraphBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/NotInGraphsBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/NotInGraphsBroadcast.java
index 4c7f1e5ae83d..698dadadb245 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/NotInGraphsBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/NotInGraphsBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/PairGraphIdWithElementId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/PairGraphIdWithElementId.java
index 383f0a7db14b..af78b8bbf474 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/PairGraphIdWithElementId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/PairGraphIdWithElementId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/PairVertexWithGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/PairVertexWithGraphs.java
index c2b263686bc8..0758766f369f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/PairVertexWithGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/PairVertexWithGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/package-info.java
index 2088ec12fde1..8767d80468fc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/graphcontainment/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/package-info.java
index 623cffce31cc..0432b90e83a2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ObjectTo1.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ObjectTo1.java
index 6768881a93cb..600333bab7b5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ObjectTo1.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ObjectTo1.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project2To0.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project2To0.java
index 9e27d7b82a74..163db73709bb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project2To0.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project2To0.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project2To1.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project2To1.java
index ef1d66f18691..d663dc1fb0f0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project2To1.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project2To1.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project3To0.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project3To0.java
index 9168affbcd3a..dc713880c3e5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project3To0.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project3To0.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project3To0And1.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project3To0And1.java
index 7284a140ab89..20d53425b6d8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project3To0And1.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project3To0And1.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project4To0And1.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project4To0And1.java
index abbfce78026c..1ba7d5b7a265 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project4To0And1.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project4To0And1.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project4To1And2And3.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project4To1And2And3.java
index fc95600a33e8..a804cc9a990a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project4To1And2And3.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Project4To1And2And3.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/SwitchPair.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/SwitchPair.java
index 22637b7c04d7..1c4084fb990f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/SwitchPair.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/SwitchPair.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ToIdWithLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ToIdWithLabel.java
index e745c18371bc..a7b577e3d5f0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ToIdWithLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ToIdWithLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Tuple2ToWithCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Tuple2ToWithCount.java
index c5af01597820..36668f8b20fe 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Tuple2ToWithCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Tuple2ToWithCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of2.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of2.java
index a2837e6a20a6..e9ec83294933 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of2.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of2.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of3.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of3.java
index d97ecb4b09fe..9223b611d8d5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of3.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of3.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of4.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of4.java
index e9638c53e7b2..60ef836f580b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of4.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value0Of4.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value1Of2.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value1Of2.java
index 04bd5f747f49..2da6531f8bb8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value1Of2.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value1Of2.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value1Of3.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value1Of3.java
index 9b968497bbac..e59541b3ee86 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value1Of3.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value1Of3.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value2Of3.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value2Of3.java
index c24b30c6e2f1..3758c42ae07d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value2Of3.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/Value2Of3.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ValueOf1.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ValueOf1.java
index 395cc26f572e..edf18050685f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ValueOf1.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ValueOf1.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ValueOfWithCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ValueOfWithCount.java
index 83c76104889a..f67bbdf3477c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ValueOfWithCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/ValueOfWithCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/package-info.java
index 0981ba1d5c34..c302b6c4dbd2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/tuple/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/AddCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/AddCount.java
index 1e1d70469e14..58b75e760c4b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/AddCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/AddCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Cast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Cast.java
index eb1dc2281b09..8eb8f2ed9554 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Cast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Cast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Duplicate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Duplicate.java
index 03ebf6f96b46..11dc98b5a366 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Duplicate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Duplicate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/First.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/First.java
index b2640acb408c..60f210ed7b2d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/First.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/First.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/IsInstance.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/IsInstance.java
index 463171d54dca..ad725273557d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/IsInstance.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/IsInstance.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftSide.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftSide.java
index 284dfb7899c8..b78fd6a6d926 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftSide.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftSide.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftSideWithRightGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftSideWithRightGraphs.java
index 69ad0c47576e..2a4b57fb54dc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftSideWithRightGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftSideWithRightGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftWhenRightIsNull.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftWhenRightIsNull.java
index a67d0f1db478..444bc2a3cf21 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftWhenRightIsNull.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/LeftWhenRightIsNull.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/OneSideEmpty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/OneSideEmpty.java
index eb8b13dbe487..ffaaf11c0e56 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/OneSideEmpty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/OneSideEmpty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/RightSide.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/RightSide.java
index ab04dd41294c..5399a1e05d6f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/RightSide.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/RightSide.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/RightSideWithLeftGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/RightSideWithLeftGraphs.java
index c8bc8739fdb4..ddd69eeec7a2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/RightSideWithLeftGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/RightSideWithLeftGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/SumCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/SumCount.java
index fbc6b943876d..194c5167d406 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/SumCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/SumCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Superstep.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Superstep.java
index 6366e3bc747e..2cd3e483cb40 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Superstep.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/Superstep.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/package-info.java
index 2502ad2c8beb..1f420f1d5a02 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/functions/utils/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/common/BaseFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/common/BaseFactory.java
index 6b889e2b0305..6e34a2bfea8e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/common/BaseFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/common/BaseFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/common/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/common/package-info.java
index b2d4efe73595..d7f1c10186bd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/common/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/common/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVEBaseFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVEBaseFactory.java
index 6cd4ee9da3a3..8a9f0029e6a5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVEBaseFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVEBaseFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVECollectionLayoutFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVECollectionLayoutFactory.java
index 96b305671b46..652b18a791be 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVECollectionLayoutFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVECollectionLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVEGraphLayoutFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVEGraphLayoutFactory.java
index 51b2005ea166..22b2d653f4c6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVEGraphLayoutFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVEGraphLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVELayout.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVELayout.java
index b917ff2d158d..848d4e94dc64 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVELayout.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/GVELayout.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVECollectionLayoutFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVECollectionLayoutFactory.java
index 0f0b1913a48f..6d9d5e26f511 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVECollectionLayoutFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVECollectionLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVEGraphLayoutFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVEGraphLayoutFactory.java
index 456901852e9c..73a13e936567 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVEGraphLayoutFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVEGraphLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVELayout.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVELayout.java
index 4470b4cfe748..8bcfd2eabef3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVELayout.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVELayout.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/package-info.java
index 9e786cd0ac03..80980ec7634b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/indexed/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/package-info.java
index 10d1a62d3bef..6e53a0a20170 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/gve/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayout.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayout.java
index ba3daf967202..4a334f5101d5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayout.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayout.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutFactory.java
index 8ad0fab501d8..661b696d1053 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/package-info.java
index 03fec5bc33b9..9a4231ccfc19 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/tuples/GraphTransaction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/tuples/GraphTransaction.java
index 86ad73663a52..0ef96afbe50d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/tuples/GraphTransaction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/tuples/GraphTransaction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/tuples/package-info.java
index 1c0f3d8f7778..5bd7ac51b68e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/layouts/transactional/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/Aggregation.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/Aggregation.java
index e7bd9f967819..dd94c36a11ce 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/Aggregation.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/Aggregation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregation.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregation.java
index 05705296a346..48b34388d4d5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregation.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateElements.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateElements.java
index 362d0fc7ba07..cb45beff2169 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateElements.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateElements.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateTransactions.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateTransactions.java
index 375150dfb17c..c90be6b48cc4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateTransactions.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateTransactions.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateUtil.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateUtil.java
index b63dd126bbd4..fd10120497d9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateUtil.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/AggregateUtil.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/ApplyAggregateElements.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/ApplyAggregateElements.java
index 53b9061f2dba..af4e77d23a6d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/ApplyAggregateElements.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/ApplyAggregateElements.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/BaseAggregateFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/BaseAggregateFunction.java
index f7d6bf5c1c48..3f0112e3c2dd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/BaseAggregateFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/BaseAggregateFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/CombinePartitionAggregates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/CombinePartitionAggregates.java
index ea50f5a93e77..2369984fefdd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/CombinePartitionAggregates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/CombinePartitionAggregates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/CombinePartitionApplyAggregates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/CombinePartitionApplyAggregates.java
index 907c70cda2d9..b11de00a1048 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/CombinePartitionApplyAggregates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/CombinePartitionApplyAggregates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SetAggregateProperties.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SetAggregateProperties.java
index 68613adaaf57..d7613e19f318 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SetAggregateProperties.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SetAggregateProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SetAggregateProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SetAggregateProperty.java
index 70b1fd204228..250d8c12e43c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SetAggregateProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SetAggregateProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/Average.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/Average.java
index 6d055ec51536..db73e9930c96 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/Average.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/Average.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageEdgeProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageEdgeProperty.java
index 836559c835cc..b2d53ef20c23 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageEdgeProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageEdgeProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageProperty.java
index 7e71c3ec660d..db22a61a74ec 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageVertexProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageVertexProperty.java
index 1bbb374986f4..6e4e66c15fbf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageVertexProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AverageVertexProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/package-info.java
index 81024c87f06b..299e3e9f1e45 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/bool/Or.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/bool/Or.java
index d3f1b083392a..10f09f095362 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/bool/Or.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/bool/Or.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/bool/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/bool/package-info.java
index d8158033100e..2ccf9935afb4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/bool/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/bool/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasEdgeLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasEdgeLabel.java
index bcfd1d8cb492..5759d40469bc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasEdgeLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasEdgeLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasLabel.java
index 7afcfb4c86de..95757df55796 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasVertexLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasVertexLabel.java
index 3b8931cdd59a..6f28d514e1fa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasVertexLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/HasVertexLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/package-info.java
index 252fc876dce2..86fc5b06b655 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/containment/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/Count.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/Count.java
index 63e3d2450df7..9671db5b822c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/Count.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/Count.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/EdgeCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/EdgeCount.java
index a5fada248deb..e52681373f2b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/EdgeCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/EdgeCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/VertexCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/VertexCount.java
index 611f36a94389..9bd8b580c86f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/VertexCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/VertexCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/package-info.java
index 0e11bde97e01..29f664c709c2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/count/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/Max.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/Max.java
index bd842de6a58b..9dda4746d015 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/Max.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/Max.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxEdgeProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxEdgeProperty.java
index 904852594671..0ccb4c6cc0ce 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxEdgeProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxEdgeProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxProperty.java
index 6a9a90d06b29..daac5f73ec8f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxVertexProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxVertexProperty.java
index f3d7a0fefd3c..e8e05872ab75 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxVertexProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/MaxVertexProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/package-info.java
index d3ad4c7b1787..8a11609086e6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/max/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/Min.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/Min.java
index bb2825e7e3cb..2aadc0e19133 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/Min.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/Min.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinEdgeProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinEdgeProperty.java
index ce1119b767f0..678e98d66efc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinEdgeProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinEdgeProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinProperty.java
index f8a41840d1d5..0628add6268c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinVertexProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinVertexProperty.java
index a56b3b819fbc..39c646d7a613 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinVertexProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/MinVertexProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/package-info.java
index 06d01edc42f5..a82bee0715be 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/min/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/package-info.java
index 6b99e8432e58..dc2e3ded0b5d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/Sum.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/Sum.java
index 7b1a365c558a..d0a94aeef95d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/Sum.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/Sum.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumEdgeProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumEdgeProperty.java
index 6273c24fe073..da3be56e45d6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumEdgeProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumEdgeProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumProperty.java
index 6ebe633805ca..be3a33a2b336 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumVertexProperty.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumVertexProperty.java
index 0949e8854afc..221487e73c68 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumVertexProperty.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/SumVertexProperty.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/package-info.java
index 01d3af52ec46..b423de3eb08b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/functions/sum/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/package-info.java
index d7f3df0e58e4..cb9ad90bca32 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/aggregation/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/BinaryCollectionToCollectionOperatorBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/BinaryCollectionToCollectionOperatorBase.java
index 938b101a60ea..2a621307f0f1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/BinaryCollectionToCollectionOperatorBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/BinaryCollectionToCollectionOperatorBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/SetOperatorBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/SetOperatorBase.java
index 05115c0d105e..d77c84742047 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/SetOperatorBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/SetOperatorBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/functions/LeftJoin0OfTuple2.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/functions/LeftJoin0OfTuple2.java
index c6fcfc6fa763..cb5e6b365916 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/functions/LeftJoin0OfTuple2.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/functions/LeftJoin0OfTuple2.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/functions/package-info.java
index 5bb8300c1a48..2ef08012ab9b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/package-info.java
index 86e06f9f01b1..e49005949ccd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/base/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/Cloning.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/Cloning.java
index 6fb08bac4444..d14b5f2e09c5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/Cloning.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/Cloning.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/ElementGraphUpdater.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/ElementGraphUpdater.java
index 519cf3116dad..078bcaba0af0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/ElementGraphUpdater.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/ElementGraphUpdater.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/Value0Of2ToId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/Value0Of2ToId.java
index b6db4c125a5d..39430a15322d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/Value0Of2ToId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/Value0Of2ToId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/package-info.java
index 903e0eaebe58..a387ea22e89a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/package-info.java
index 831eb8f3b5fc..a8f746670dc2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/cloning/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/Combination.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/Combination.java
index 47878db5fd5f..0103adebd062 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/Combination.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/Combination.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/ReduceCombination.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/ReduceCombination.java
index 8303fe01bd62..0b3567b399f8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/ReduceCombination.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/ReduceCombination.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/package-info.java
index 5a3061363679..e38cce84de52 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/combination/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/Count.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/Count.java
index 92909800ca86..506b90cbb03a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/Count.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/Count.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple1With1L.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple1With1L.java
index a5e0cef8f2e8..84ca559ddeb6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple1With1L.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple1With1L.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple2FromTupleWithObjectAnd1L.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple2FromTupleWithObjectAnd1L.java
index ac34d9b9ff10..c40015dc6730 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple2FromTupleWithObjectAnd1L.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple2FromTupleWithObjectAnd1L.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple2WithObjectAnd1L.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple2WithObjectAnd1L.java
index e65b791b5a6b..03f6531a05d3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple2WithObjectAnd1L.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/Tuple2WithObjectAnd1L.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/package-info.java
index 73bcc949c01f..15a6eb11def9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/package-info.java
index ba6fa9d78479..a6e7eedc5fb5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/count/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/Difference.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/Difference.java
index add11231b61a..59d9b7110875 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/Difference.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/Difference.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/DifferenceBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/DifferenceBroadcast.java
index 8b6b6cdee55a..e4302b97a7b4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/DifferenceBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/DifferenceBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/CreateTuple2WithLong.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/CreateTuple2WithLong.java
index 4fa587743b5f..f86eaccf43fe 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/CreateTuple2WithLong.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/CreateTuple2WithLong.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/IdOf0InTuple2.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/IdOf0InTuple2.java
index 3b0ec40a7b7f..d39b76ab6b20 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/IdOf0InTuple2.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/IdOf0InTuple2.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/RemoveCut.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/RemoveCut.java
index 57612e4c8ea3..1b561461a68e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/RemoveCut.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/RemoveCut.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/package-info.java
index 1a3740272cc6..0defc16c0456 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/package-info.java
index 56f0ed0831a1..6b606d2fa7c1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/difference/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/DistinctById.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/DistinctById.java
index 16faa5ef2db0..2ce91c4ac7c1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/DistinctById.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/DistinctById.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphism.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphism.java
index 0c144c76ab25..2d7fd4e201f6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphism.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphism.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/GroupByIsomorphism.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/GroupByIsomorphism.java
index f8cf7cb5b8b3..a866c2fa020e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/GroupByIsomorphism.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/GroupByIsomorphism.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/CountGraphHeads.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/CountGraphHeads.java
index 9fbd4b833c53..34f71bc2059d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/CountGraphHeads.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/CountGraphHeads.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/FirstGraphHead.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/FirstGraphHead.java
index 5d40dbf261b9..07474918815a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/FirstGraphHead.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/FirstGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/GraphHeadGroup.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/GraphHeadGroup.java
index 6ec494691627..51e10af91b8e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/GraphHeadGroup.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/GraphHeadGroup.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/IdFromGraphHeadString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/IdFromGraphHeadString.java
index f48c4495d6c0..fb0579b5739b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/IdFromGraphHeadString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/IdFromGraphHeadString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/package-info.java
index 80815896cfa5..86a121f7ea26 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/package-info.java
index 6bde7867517e..78aba6d758a9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/distinction/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/CollectionEquality.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/CollectionEquality.java
index b9ca70903a93..925d47deacda 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/CollectionEquality.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/CollectionEquality.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/CollectionEqualityByGraphIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/CollectionEqualityByGraphIds.java
index 4e6afd6979f7..ea3da967951d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/CollectionEqualityByGraphIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/CollectionEqualityByGraphIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/GraphEquality.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/GraphEquality.java
index 77b2ccb8aed8..0198349d349f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/GraphEquality.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/GraphEquality.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/package-info.java
index 002d2af83fc5..a64fb4a5d68d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/equality/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/Exclusion.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/Exclusion.java
index 97703bcc5f59..3c96e0dab6b1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/Exclusion.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/Exclusion.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/ReduceExclusion.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/ReduceExclusion.java
index 589f002146aa..075536e4360a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/ReduceExclusion.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/ReduceExclusion.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/package-info.java
index 6d5f3232edad..ec2e806119ec 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/exclusion/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/AddNewIdToDuplicatedEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/AddNewIdToDuplicatedEdge.java
index ff287475d504..83c5789069a8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/AddNewIdToDuplicatedEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/AddNewIdToDuplicatedEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusion.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusion.java
index 2ba5527e5c29..67d791394519 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusion.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusion.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CoGroupAssociateOldVerticesWithNewIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CoGroupAssociateOldVerticesWithNewIds.java
index 9322409ea0a5..d819968bc4f3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CoGroupAssociateOldVerticesWithNewIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CoGroupAssociateOldVerticesWithNewIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CoGroupGraphHeadToVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CoGroupGraphHeadToVertex.java
index 433677fe7609..5bd5c290f78e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CoGroupGraphHeadToVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CoGroupGraphHeadToVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CreateFusedVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CreateFusedVertex.java
index 00ec917ecf88..5456eb3b4e73 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CreateFusedVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/CreateFusedVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/FilterSubgraphEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/FilterSubgraphEdges.java
index 520b5ab3534d..934da1cfa542 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/FilterSubgraphEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/FilterSubgraphEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/FlatJoinSourceEdgeReference.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/FlatJoinSourceEdgeReference.java
index 11803efbfe91..564109a6b418 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/FlatJoinSourceEdgeReference.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/FlatJoinSourceEdgeReference.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/LeftElementId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/LeftElementId.java
index 0da21bbeafae..1183a9736f5a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/LeftElementId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/LeftElementId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapFunctionAddGraphElementToGraph2.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapFunctionAddGraphElementToGraph2.java
index 0c3d9141f290..637c81e4ffaf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapFunctionAddGraphElementToGraph2.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapFunctionAddGraphElementToGraph2.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapGraphHeadForNewGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapGraphHeadForNewGraph.java
index dd4c57cf6774..93b84c29ae38 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapGraphHeadForNewGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapGraphHeadForNewGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapVertexToPairWithGraphId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapVertexToPairWithGraphId.java
index 510834d13c43..6052da98d921 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapVertexToPairWithGraphId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapVertexToPairWithGraphId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapVerticesAsTuplesWithNullId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapVerticesAsTuplesWithNullId.java
index f7cb801ca0db..fd882e2a0010 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapVerticesAsTuplesWithNullId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/MapVerticesAsTuplesWithNullId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/UpdateEdgesThoughToBeFusedVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/UpdateEdgesThoughToBeFusedVertices.java
index f461d57907e2..350e6527cd08 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/UpdateEdgesThoughToBeFusedVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/UpdateEdgesThoughToBeFusedVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/package-info.java
index 82edc2321435..846d56ad8062 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/package-info.java
index cd66762e8640..13f2befd92f9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/fusion/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/Grouping.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/Grouping.java
index 41cb05aea9e7..277028f295a5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/Grouping.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/Grouping.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombine.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombine.java
index b40f487ad5a6..7a0816c3f43c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombine.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombine.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduce.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduce.java
index 8d90bfdc822f..aaf8a250a87f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduce.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduce.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingStrategy.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingStrategy.java
index 9d444e431f39..3217756710bb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingStrategy.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/GroupingStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildBase.java
index d32d90b40ffd..a20c5b4c07e8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildEdgeGroupItem.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildEdgeGroupItem.java
index 7987aa05a260..4115bd125737 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildEdgeGroupItem.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildEdgeGroupItem.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildGroupItemBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildGroupItemBase.java
index 501368ad638a..ee03b4e5658e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildGroupItemBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildGroupItemBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildSuperEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildSuperEdge.java
index abaf5e986779..18cd2f5833e1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildSuperEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildSuperEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildSuperVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildSuperVertex.java
index 6b7fd34b4394..5f50d195b887 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildSuperVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildSuperVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexGroupItem.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexGroupItem.java
index ede26f26281e..11a28d764f01 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexGroupItem.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexGroupItem.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexWithSuperVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexWithSuperVertex.java
index 53511cabbbbc..3f8891564177 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexWithSuperVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexWithSuperVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexWithSuperVertexBC.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexWithSuperVertexBC.java
index b21066ba607f..80fedd49ede5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexWithSuperVertexBC.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/BuildVertexWithSuperVertexBC.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/CombineEdgeGroupItems.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/CombineEdgeGroupItems.java
index 9754c69fd413..24788494c816 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/CombineEdgeGroupItems.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/CombineEdgeGroupItems.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/CombineVertexGroupItems.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/CombineVertexGroupItems.java
index 689164ba2473..03d4b1523070 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/CombineVertexGroupItems.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/CombineVertexGroupItems.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/FilterRegularVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/FilterRegularVertices.java
index 8b47309e58c0..42570b40cc1c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/FilterRegularVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/FilterRegularVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/FilterSuperVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/FilterSuperVertices.java
index 7e2b1d97a7b2..b1ffdab7d232 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/FilterSuperVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/FilterSuperVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/LabelGroupFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/LabelGroupFilter.java
index f617126c823a..78c3a1e559d8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/LabelGroupFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/LabelGroupFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceEdgeGroupItems.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceEdgeGroupItems.java
index 125a6a636ff2..e14e82120514 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceEdgeGroupItems.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceEdgeGroupItems.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceVertexGroupItemBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceVertexGroupItemBase.java
index 21abe8b4fc0e..4372c417cdc4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceVertexGroupItemBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceVertexGroupItemBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceVertexGroupItems.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceVertexGroupItems.java
index e79dbac5ae65..f70d369f6ddc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceVertexGroupItems.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/ReduceVertexGroupItems.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/SetVertexAsSuperVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/SetVertexAsSuperVertex.java
index 20a640dfeca5..c3b39dfba8fa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/SetVertexAsSuperVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/SetVertexAsSuperVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/TransposeVertexGroupItems.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/TransposeVertexGroupItems.java
index 821a2c1be45b..94caec968458 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/TransposeVertexGroupItems.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/TransposeVertexGroupItems.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/UpdateEdgeGroupItem.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/UpdateEdgeGroupItem.java
index afe34e958e29..1a7bc0609a76 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/UpdateEdgeGroupItem.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/UpdateEdgeGroupItem.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/package-info.java
index 668b4ac89894..51df98f6b9c3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/package-info.java
index 15288f084a87..7ac56c9e24e7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/EdgeGroupItem.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/EdgeGroupItem.java
index 1d83a5467adb..6c04fb0b5ca9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/EdgeGroupItem.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/EdgeGroupItem.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/GroupItem.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/GroupItem.java
index f6126dfa6b35..84ba0b9aa160 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/GroupItem.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/GroupItem.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/LabelGroup.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/LabelGroup.java
index 941a5ebb7536..156b9f6d6482 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/LabelGroup.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/LabelGroup.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/VertexGroupItem.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/VertexGroupItem.java
index 29c6eee052e3..47905ccd46c4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/VertexGroupItem.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/VertexGroupItem.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/VertexWithSuperVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/VertexWithSuperVertex.java
index 489b2cc6a1cb..4975562966af 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/VertexWithSuperVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/VertexWithSuperVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/package-info.java
index 4e401b78479c..1d3bf9b2fc95 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/grouping/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/Intersection.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/Intersection.java
index 4e585f796269..4d068935c015 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/Intersection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/Intersection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/IntersectionBroadcast.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/IntersectionBroadcast.java
index ce4aa7a3aaae..292741e02a87 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/IntersectionBroadcast.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/IntersectionBroadcast.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/functions/GroupCountEquals.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/functions/GroupCountEquals.java
index d61e6abe7847..c5b3d2f992bc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/functions/GroupCountEquals.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/functions/GroupCountEquals.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/functions/package-info.java
index 6e695b560813..12ba416f7cfb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/package-info.java
index 4c75b6ff4f66..b47f4cc35efa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/intersection/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/GroupingKeys.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/GroupingKeys.java
index 3efe1d74dd12..1ecfaaea03cc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/GroupingKeys.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/GroupingKeys.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/KeyedGrouping.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/KeyedGrouping.java
index 52196e6f62c8..f27f2625bde1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/KeyedGrouping.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/KeyedGrouping.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/KeyedGroupingUtils.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/KeyedGroupingUtils.java
index f87249ef0ec3..bdc812ddc246 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/KeyedGroupingUtils.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/KeyedGroupingUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperEdgeFromTuple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperEdgeFromTuple.java
index 2d427b3c24b1..f81845fe95e1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperEdgeFromTuple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperEdgeFromTuple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperElementFromTuple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperElementFromTuple.java
index 69bde87310a7..a4d93dd5146e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperElementFromTuple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperElementFromTuple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperVertexFromTuple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperVertexFromTuple.java
index e5e30e1e5a7e..7b189ae4130a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperVertexFromTuple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildSuperVertexFromTuple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromEdges.java
index b6b8a9dfa199..1b2e73d6b7b4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromElements.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromElements.java
index 59f500b067b3..e5bec526e704 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromElements.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromElements.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromVertices.java
index fdc58cdc9180..9da20a254e10 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/BuildTuplesFromVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/FilterSuperVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/FilterSuperVertices.java
index b2ee13363902..13577352d205 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/FilterSuperVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/FilterSuperVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/GroupingConstants.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/GroupingConstants.java
index a4f3b99b0900..0fc51e17a6fa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/GroupingConstants.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/GroupingConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceEdgeTuples.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceEdgeTuples.java
index bed1db2dbb88..fdc128125e3a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceEdgeTuples.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceEdgeTuples.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceElementTuples.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceElementTuples.java
index 6fd085d44396..ddd14c867957 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceElementTuples.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceElementTuples.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceVertexTuples.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceVertexTuples.java
index ec9f48b95a3b..4370fd357a40 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceVertexTuples.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/ReduceVertexTuples.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/UpdateIdField.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/UpdateIdField.java
index d4a39dfa8ab7..9716b026e689 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/UpdateIdField.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/UpdateIdField.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/package-info.java
index 3c5626abfc6d..cc5ee3da73b4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/CompositeKeyFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/CompositeKeyFunction.java
index 9086e46d91b0..2d12cb11a9ba 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/CompositeKeyFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/CompositeKeyFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/CompositeKeyFunctionWithDefaultValues.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/CompositeKeyFunctionWithDefaultValues.java
index aba03f5c9cf7..6b476001c067 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/CompositeKeyFunctionWithDefaultValues.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/CompositeKeyFunctionWithDefaultValues.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/ConstantKeyFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/ConstantKeyFunction.java
index ec89af9ba8c9..64546acc92c9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/ConstantKeyFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/ConstantKeyFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/LabelKeyFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/LabelKeyFunction.java
index 2e985faba7d2..f313ce66db8a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/LabelKeyFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/LabelKeyFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/PropertyKeyFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/PropertyKeyFunction.java
index 62a36dccf5e3..886d12263aab 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/PropertyKeyFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/PropertyKeyFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/package-info.java
index 0d2ab56a9632..a701a6ce66e5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/AggregatorWrapperWithValue.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/AggregatorWrapperWithValue.java
index 1dc80da6f755..556b846f8da5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/AggregatorWrapperWithValue.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/AggregatorWrapperWithValue.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/LabelSpecificAggregatorWrapper.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/LabelSpecificAggregatorWrapper.java
index 02cfb440bae8..d864c2c3b358 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/LabelSpecificAggregatorWrapper.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/LabelSpecificAggregatorWrapper.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/LabelSpecificKeyFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/LabelSpecificKeyFunction.java
index 9015866f18eb..4572e7f1364e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/LabelSpecificKeyFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/LabelSpecificKeyFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/UnlabeledGroupAggregatorWrapper.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/UnlabeledGroupAggregatorWrapper.java
index e19cfaa0ca33..342e017c0769 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/UnlabeledGroupAggregatorWrapper.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/UnlabeledGroupAggregatorWrapper.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/package-info.java
index b8513ec3f072..ebb5f118c9b4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/labelspecific/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/package-info.java
index 76481ad0423c..b929ece6f420 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/keyedgrouping/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/limit/Limit.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/limit/Limit.java
index fe7299b32546..37a1d318cb1d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/limit/Limit.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/limit/Limit.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/limit/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/limit/package-info.java
index 2cd29a0d562e..c01bea70b125 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/limit/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/limit/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/MatchStrategy.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/MatchStrategy.java
index cb9b4b27bc2a..0f5970c46a38 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/MatchStrategy.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/MatchStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/PostProcessor.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/PostProcessor.java
index e274ff6b5c95..a85b33248b6e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/PostProcessor.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/PostProcessor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/PreProcessor.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/PreProcessor.java
index 49504bd4ccce..9efcd616b941 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/PreProcessor.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/PreProcessor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/PrintIdWithCandidates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/PrintIdWithCandidates.java
index 38df3ef5878a..33bf972775fa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/PrintIdWithCandidates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/PrintIdWithCandidates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/PrintTripleWithCandidates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/PrintTripleWithCandidates.java
index b6e7b87f0897..c3b6b1f4edb1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/PrintTripleWithCandidates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/PrintTripleWithCandidates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/Printer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/Printer.java
index 5f3dff962d36..a677d996efc3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/Printer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/Printer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/package-info.java
index 5b65ad85b195..db6f43cd0773 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/debug/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AbstractBuilder.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AbstractBuilder.java
index 633d7b9f6af9..890b5929c673 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AbstractBuilder.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AbstractBuilder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AbstractFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AbstractFilter.java
index 003b8d3c9441..6dbca6e9dfdd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AbstractFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AbstractFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AddGraphElementToNewGraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AddGraphElementToNewGraph.java
index 68442791386f..762ec9e30f29 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AddGraphElementToNewGraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AddGraphElementToNewGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/BuildIdWithCandidates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/BuildIdWithCandidates.java
index c11194ffca49..68661859d5dd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/BuildIdWithCandidates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/BuildIdWithCandidates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/BuildTripleWithCandidates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/BuildTripleWithCandidates.java
index eb346cc622de..e1fb880ce02c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/BuildTripleWithCandidates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/BuildTripleWithCandidates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementHasCandidate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementHasCandidate.java
index a6031e9aabeb..7c716f3e5f90 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementHasCandidate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementHasCandidate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementsFromEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementsFromEmbedding.java
index b7c8db00ce48..1543d7e3f7a5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementsFromEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementsFromEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingEdges.java
index 3e3f9cf6ac0b..0cb28933b030 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingPairs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingPairs.java
index d01435700d31..59b4915b6e75 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingPairs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingPairs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingTriples.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingTriples.java
index 3db27d40310f..93bebc407fcc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingTriples.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingTriples.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingVertices.java
index 68f584b5c8fc..c9fda8495e91 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/MatchingVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/TripleHasCandidate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/TripleHasCandidate.java
index 5e2ae1b92345..5779ccb93205 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/TripleHasCandidate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/TripleHasCandidate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/package-info.java
index 790674d667b7..15762a7ba8b8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/matching/ElementMatcher.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/matching/ElementMatcher.java
index d9cddcf2b826..74c2da97cfd7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/matching/ElementMatcher.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/matching/ElementMatcher.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/matching/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/matching/package-info.java
index d18b9b1fcd02..81cf6baf496f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/matching/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/matching/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/package-info.java
index 591b7f94db29..5954745ed058 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/DFSTraverser.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/DFSTraverser.java
index 16ceefb1f52e..ce713bccedc7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/DFSTraverser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/DFSTraverser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/GraphMetrics.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/GraphMetrics.java
index 4787e0fc29f2..04c1a0f7d254 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/GraphMetrics.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/GraphMetrics.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/QueryHandler.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/QueryHandler.java
index 71bc42ae7888..506c5735b438 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/QueryHandler.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/QueryHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/RootedTraverser.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/RootedTraverser.java
index 133bd71d6c8c..441be6193159 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/RootedTraverser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/RootedTraverser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Step.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Step.java
index e5bbb721e9d3..f8f14250dd5e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Step.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Step.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/TraversalCode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/TraversalCode.java
index 625e3bfe761d..9e28fffc4274 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/TraversalCode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/TraversalCode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Traverser.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Traverser.java
index 0ae5489eccd3..f7cc42c521a3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Traverser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Traverser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Triple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Triple.java
index 44c10c7e9706..87eed58550d6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Triple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/Triple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/package-info.java
index 182eb19d20f7..4bab0e676981 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNF.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNF.java
index dff0543372fc..455895880726 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNF.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNF.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFElement.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFElement.java
index a134728b3f2d..ce68b602640d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFElement.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/PredicateCollection.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/PredicateCollection.java
index 97191b0adf8e..9f8a89c0ca97 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/PredicateCollection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/PredicateCollection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/QueryComparable.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/QueryComparable.java
index 1566d8871d07..1551b4d39dac 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/QueryComparable.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/QueryComparable.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/QueryPredicate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/QueryPredicate.java
index a9fabeac096a..664be8c12d07 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/QueryPredicate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/QueryPredicate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/AndPredicate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/AndPredicate.java
index dc138960cb30..fab93a2fead3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/AndPredicate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/AndPredicate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/NotPredicate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/NotPredicate.java
index bbc8aea37e1e..15c41bf48227 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/NotPredicate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/NotPredicate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/OrPredicate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/OrPredicate.java
index 8b353181118d..2fc30653a4f6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/OrPredicate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/OrPredicate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/XorPredicate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/XorPredicate.java
index 7af55ff340d6..0603aa0d7641 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/XorPredicate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/XorPredicate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/package-info.java
index 7f03af8b3dbd..ef9916c9b19b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/ElementSelectorComparable.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/ElementSelectorComparable.java
index d34e9cffc8c0..cfaf2c1f0ebb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/ElementSelectorComparable.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/ElementSelectorComparable.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/LiteralComparable.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/LiteralComparable.java
index ad2822f64adf..d4d1aae223ff 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/LiteralComparable.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/LiteralComparable.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/PropertySelectorComparable.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/PropertySelectorComparable.java
index 22fbd984a0e5..ffd3cb578995 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/PropertySelectorComparable.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/PropertySelectorComparable.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/package-info.java
index 05d5e4a7fc93..99544f046fec 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/comparables/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/ComparisonExpression.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/ComparisonExpression.java
index 2a758e44fb3e..c65eedb82dfd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/ComparisonExpression.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/ComparisonExpression.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/package-info.java
index 454520b39cc9..811c023369f2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/package-info.java
index 470bd4d31cf6..3d721102431e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatistics.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatistics.java
index e85e6f1bf681..aa3a5725e0ea 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatistics.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatistics.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsHDFSReader.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsHDFSReader.java
index 0c5166b08a30..d7e9a3848282 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsHDFSReader.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsHDFSReader.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsLocalFSReader.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsLocalFSReader.java
index 123c9defa45a..69ccbf2a98d9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsLocalFSReader.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsLocalFSReader.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsReader.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsReader.java
index 9a921fab7835..946ea821e2e0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsReader.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsReader.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/package-info.java
index 3422f46c6119..00de787198e1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/Embedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/Embedding.java
index 4a01155dd10b..1d32600f12c2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/Embedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/Embedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/IdWithCandidates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/IdWithCandidates.java
index 1efafba30522..e2567bcca5cd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/IdWithCandidates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/IdWithCandidates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/TripleWithCandidates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/TripleWithCandidates.java
index c8c786d57ca4..455be821d96e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/TripleWithCandidates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/TripleWithCandidates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/TripleWithSourceEdgeCandidates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/TripleWithSourceEdgeCandidates.java
index d054de0953ce..269f70dc29ad 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/TripleWithSourceEdgeCandidates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/TripleWithSourceEdgeCandidates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/package-info.java
index fe7985891ffc..9cc3a14e259a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/common/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/package-info.java
index 26a7259c524c..4cecde1cea8e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatching.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatching.java
index 78a26d9cc884..edaf95b755f3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatching.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatching.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatching.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatching.java
index 3b2cc7b96cbb..f612b6190eac 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatching.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatching.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/debug/PrintEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/debug/PrintEmbedding.java
index 87e66030ab5b..adcafc80e19e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/debug/PrintEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/debug/PrintEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/debug/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/debug/package-info.java
index 6890b08c107e..a24a6aeceac6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/debug/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/debug/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/ElementsFromEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/ElementsFromEmbedding.java
index a01fa8ccc296..c9c02de2c708 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/ElementsFromEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/ElementsFromEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/ReverseEdgeEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/ReverseEdgeEmbedding.java
index 1e9ca305bfc2..e1be3a4def1d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/ReverseEdgeEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/ReverseEdgeEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/package-info.java
index 28288c077e8b..5975819eecbb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/PhysicalOperator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/PhysicalOperator.java
index be0cf218a45a..1f008b2f6dcf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/PhysicalOperator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/PhysicalOperator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/AddEmbeddingsElements.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/AddEmbeddingsElements.java
index dfcdb8ffffe4..6ab79ecbcd32 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/AddEmbeddingsElements.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/AddEmbeddingsElements.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/functions/AddEmbeddingElements.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/functions/AddEmbeddingElements.java
index 6a5dfa9cc6bd..796431896d78 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/functions/AddEmbeddingElements.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/functions/AddEmbeddingElements.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/functions/package-info.java
index d921f57195cc..e8a0e86e79c3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/package-info.java
index 0db17815fe70..e38c279ee9cd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/add/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddings.java
index fe4a7589cd69..137b42439b4a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsBulk.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsBulk.java
index e19cde2ee5b5..360233ca3209 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsBulk.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsBulk.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsForLoop.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsForLoop.java
index 8ae63a13499d..ea8c5dc807c5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsForLoop.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsForLoop.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/AdoptEmptyPaths.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/AdoptEmptyPaths.java
index a04afc32a030..051e091ab1ba 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/AdoptEmptyPaths.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/AdoptEmptyPaths.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/CreateExpandEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/CreateExpandEmbedding.java
index a38327e4674b..d46c0b35473c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/CreateExpandEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/CreateExpandEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractExpandColumn.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractExpandColumn.java
index 048a05d72ad0..036269cff55d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractExpandColumn.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractExpandColumn.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractKeyedCandidateEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractKeyedCandidateEdges.java
index 98874e90f3c0..a9eec402cad2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractKeyedCandidateEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractKeyedCandidateEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/FilterPreviousExpandEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/FilterPreviousExpandEmbedding.java
index 18405b0b77ed..541cbf3afd98 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/FilterPreviousExpandEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/FilterPreviousExpandEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/MergeExpandEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/MergeExpandEmbeddings.java
index 052a2fe3b7a7..0151b70eb560 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/MergeExpandEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/MergeExpandEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/PostProcessExpandEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/PostProcessExpandEmbedding.java
index 6b6f7ea3b321..a347eafb45fd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/PostProcessExpandEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/PostProcessExpandEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/package-info.java
index d177f8486a05..d7f2b54bf7ad 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/package-info.java
index b4e889676f0a..74994b98f1e4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/EdgeWithTiePoint.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/EdgeWithTiePoint.java
index 701d93885239..4cd85936b07e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/EdgeWithTiePoint.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/EdgeWithTiePoint.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/ExpandEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/ExpandEmbedding.java
index fa496c9103d9..3708a10bee19 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/ExpandEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/ExpandEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/package-info.java
index dc9aa57f6b88..51995e65f9a7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectEdges.java
index 3c6eca4e4f4b..05b0ae706b5b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectTriples.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectTriples.java
index 969333bc3ac6..db6a945cf09d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectTriples.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectTriples.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVertices.java
index c02fa65be24c..736279f747f2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVerticesAlt.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVerticesAlt.java
index 083a6fd3c8b2..1dcfd35e04e6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVerticesAlt.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVerticesAlt.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterEmbeddings.java
index 970d8935bed0..0f32c7540078 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectEdge.java
index b966c7bab635..64ee2e0e6174 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectTriple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectTriple.java
index 9c2a8b5793e2..e28d8d03ae3c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectTriple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectTriple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectVertex.java
index 3b4cd7f4448f..cc20e51aeacd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterAndProjectVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterEdge.java
index e7f4c603648c..62a4ecaed137 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterEmbedding.java
index 6b30232c354c..cf408fc5b435 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterVertex.java
index 6ce06d4035f0..f055387c61c8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/FilterVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/package-info.java
index d619ec4a8e01..2ee3655a619e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/package-info.java
index 8f134e2bccad..029fa5e139a4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/CartesianProduct.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/CartesianProduct.java
index f448003687d8..589c1a672fb8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/CartesianProduct.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/CartesianProduct.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/JoinEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/JoinEmbeddings.java
index 9d6efb905f85..a6473f51bcb6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/JoinEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/JoinEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/ValueJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/ValueJoin.java
index 4958b171256a..6014bc79bf39 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/ValueJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/ValueJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractJoinColumns.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractJoinColumns.java
index 8aa0d7bb377b..c1a4f9453cfa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractJoinColumns.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractJoinColumns.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractPropertyJoinColumns.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractPropertyJoinColumns.java
index 58b550c4ebca..b32faea08003 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractPropertyJoinColumns.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractPropertyJoinColumns.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/MergeEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/MergeEmbeddings.java
index ee2b77b7f45d..e3368852f3a8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/MergeEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/MergeEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/package-info.java
index 80189cc2057f..e5ba9ccebe4e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/package-info.java
index e2926ad9cf52..a2b4f9f5747e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/package-info.java
index 4e09122fd1ba..481e9bb6ed0c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEdges.java
index cfbfc14f3fc4..39a1d6416ca1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddings.java
index 686c9bfd5d85..e266cd1c137b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddingsElements.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddingsElements.java
index f05c2718768d..89340b6bdd2c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddingsElements.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddingsElements.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectVertices.java
index 7d95643edcdb..976b5d360ba0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEdge.java
index 5b7518c1c49d..c57f4af2b0fa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEmbedding.java
index 8913546b1760..58fb694fee76 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEmbeddingElements.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEmbeddingElements.java
index 75f52d1d1b02..3cafc2bbd1e9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEmbeddingElements.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectEmbeddingElements.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectVertex.java
index ea81a67ae222..971bf8404474 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/ProjectVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/package-info.java
index 8feb670448e5..2019ca2f98d5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/package-info.java
index b25aec33eab7..3d43d755a79b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/package-info.java
index 757723c931fc..c0314e92b875 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/Estimator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/Estimator.java
index 3da89fc16e2b..83e312f00b5d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/Estimator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/Estimator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/FilterEstimator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/FilterEstimator.java
index 5bfdf72d605f..01d945189d87 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/FilterEstimator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/FilterEstimator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/JoinEstimator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/JoinEstimator.java
index cc2c24b9ac04..aa028160b146 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/JoinEstimator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/JoinEstimator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/QueryPlanEstimator.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/QueryPlanEstimator.java
index 7591dba54772..e5d5d3acf729 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/QueryPlanEstimator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/QueryPlanEstimator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/package-info.java
index 6d8d5dfbc0a8..02c164e6ba06 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/greedy/GreedyPlanner.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/greedy/GreedyPlanner.java
index 51599445ab1f..f96afe9164f2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/greedy/GreedyPlanner.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/greedy/GreedyPlanner.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/greedy/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/greedy/package-info.java
index 1ba152a63684..7bbe5e2df0d4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/greedy/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/greedy/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/package-info.java
index 87bfc619f3e6..cda4dabd47dd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/planner/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/PlanTable.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/PlanTable.java
index f937626c8563..0a87108e8d35 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/PlanTable.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/PlanTable.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/PlanTableEntry.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/PlanTableEntry.java
index 2547bc77e34d..0c56847d6160 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/PlanTableEntry.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/PlanTableEntry.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/package-info.java
index 125eb6e5abe4..24e32a9a76d5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/plantable/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/BinaryNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/BinaryNode.java
index 61bab0bcdecb..f1e66efda4e0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/BinaryNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/BinaryNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/FilterNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/FilterNode.java
index 3774e1c39c25..03e279d7140b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/FilterNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/FilterNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/JoinNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/JoinNode.java
index 186d1c03912c..e78acb5b5363 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/JoinNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/JoinNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/LeafNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/LeafNode.java
index 2142fdbfaec4..03a6883a79c8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/LeafNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/LeafNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/PlanNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/PlanNode.java
index 7f131cd1e52d..3df9824c0ef9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/PlanNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/PlanNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/ProjectionNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/ProjectionNode.java
index 1b1eaf967fd1..21fb3d696221 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/ProjectionNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/ProjectionNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/QueryPlan.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/QueryPlan.java
index 07073ede92b4..4964b7e7cf85 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/QueryPlan.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/QueryPlan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/UnaryNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/UnaryNode.java
index b65924fe9d68..f1fc18553f52 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/UnaryNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/UnaryNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/CartesianProductNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/CartesianProductNode.java
index 9834ec45e11c..82665a5c3752 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/CartesianProductNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/CartesianProductNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ExpandEmbeddingsNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ExpandEmbeddingsNode.java
index aa5f4f163378..ddb3836f7840 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ExpandEmbeddingsNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ExpandEmbeddingsNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/JoinEmbeddingsNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/JoinEmbeddingsNode.java
index 058ffa9ad82c..b8cbd6c848fc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/JoinEmbeddingsNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/JoinEmbeddingsNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ValueJoinNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ValueJoinNode.java
index 57bc777b4f08..5687fca73dd7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ValueJoinNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ValueJoinNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/package-info.java
index 7bb7c8369671..b6fa4d0e3320 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectEdgesNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectEdgesNode.java
index 7fa29c1187cd..e983793e2df2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectEdgesNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectEdgesNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectVerticesNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectVerticesNode.java
index 975d4619b710..b17c626f5377 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectVerticesNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectVerticesNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/package-info.java
index 6971f5d18b7d..7d4f6201d3c4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/package-info.java
index 4669d4fd1b25..f967bbeed5f8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/FilterEmbeddingsNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/FilterEmbeddingsNode.java
index dc3025fc574e..ac4f69e8b368 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/FilterEmbeddingsNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/FilterEmbeddingsNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/ProjectEmbeddingsNode.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/ProjectEmbeddingsNode.java
index 9f5f5aeb3655..798d1d106783 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/ProjectEmbeddingsNode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/ProjectEmbeddingsNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/package-info.java
index a44058b032a2..a98c6a6fae37 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/Embedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/Embedding.java
index 2063ec6536de..217457b69a55 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/Embedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/Embedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/EmbeddingFactory.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/EmbeddingFactory.java
index 3b45618b9444..e6e2f0b8640e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/EmbeddingFactory.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/EmbeddingFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/EmbeddingMetaData.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/EmbeddingMetaData.java
index 08dc9d5a272c..9ff75556032f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/EmbeddingMetaData.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/EmbeddingMetaData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/Triple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/Triple.java
index 5e1fd6c4e665..2cd71a14f3a7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/Triple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/Triple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/package-info.java
index 5f6e85bfc753..285e76abc8b9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/pojos/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/utils/ExpandDirection.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/utils/ExpandDirection.java
index 9fb0feda6849..ee66aa711315 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/utils/ExpandDirection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/utils/ExpandDirection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/utils/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/utils/package-info.java
index b4ed8088f88f..f82016bf6de4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/utils/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/utils/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/package-info.java
index bb5587cbc0e8..ef28b2a2da0c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativePatternMatching.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativePatternMatching.java
index d048f55cd46c..e5b60446617d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativePatternMatching.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativePatternMatching.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintEdgeStep.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintEdgeStep.java
index b68d18f9f64c..4b23aa575cfd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintEdgeStep.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintEdgeStep.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintEmbeddingWithTiePoint.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintEmbeddingWithTiePoint.java
index 8f09dd27f9c5..5e2162988d7f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintEmbeddingWithTiePoint.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintEmbeddingWithTiePoint.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintVertexStep.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintVertexStep.java
index a73fa5f6d98a..a383cb41db44 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintVertexStep.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/PrintVertexStep.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/package-info.java
index e45925ead7e6..dc07dd8eecea 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/debug/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEdgeStep.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEdgeStep.java
index ff2147b1c327..bb74d4ecd68d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEdgeStep.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEdgeStep.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbedding.java
index 9115fbcd158c..00219dcfb2e7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbeddingFromTriple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbeddingFromTriple.java
index 986bff7714e5..2c788d467bed 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbeddingFromTriple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbeddingFromTriple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbeddingFromVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbeddingFromVertex.java
index e9c016ec080a..2aa1f301a08c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbeddingFromVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildEmbeddingFromVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildVertexStep.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildVertexStep.java
index e3a67cfed8fd..7b8948c7a2ef 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildVertexStep.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/BuildVertexStep.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/EdgeHasCandidate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/EdgeHasCandidate.java
index 355c1a58e79a..9282aee0524d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/EdgeHasCandidate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/EdgeHasCandidate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateEdgeMapping.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateEdgeMapping.java
index 3176f891f253..fa3edc90dc68 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateEdgeMapping.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateEdgeMapping.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateMapping.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateMapping.java
index dcb61cec6ee8..2f0e17c33472 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateMapping.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateMapping.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateVertexEdgeMapping.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateVertexEdgeMapping.java
index 58187cace218..2b56c3e036ee 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateVertexEdgeMapping.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateVertexEdgeMapping.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateVertexMapping.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateVertexMapping.java
index caed47c19ae0..f5afaf64992f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateVertexMapping.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/UpdateVertexMapping.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/VertexHasCandidate.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/VertexHasCandidate.java
index f0d5d0a719b5..132e6db0b851 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/VertexHasCandidate.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/VertexHasCandidate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/package-info.java
index fef1761d9777..abe76fb47467 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/package-info.java
index 7f74e722cbee..22f877668826 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/DistributedTraverser.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/DistributedTraverser.java
index f4ac89a52195..ee7227474d79 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/DistributedTraverser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/DistributedTraverser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairBulkTraverser.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairBulkTraverser.java
index 34ac311b939d..38cb8f4b93b8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairBulkTraverser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairBulkTraverser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairForLoopTraverser.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairForLoopTraverser.java
index 72e4d026cb6d..2839b220c4c2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairForLoopTraverser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairForLoopTraverser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairTraverser.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairTraverser.java
index 91b43a036bd9..46c18402b14a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairTraverser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/SetPairTraverser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TraverserStrategy.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TraverserStrategy.java
index 624bb403231b..f280e092bdce 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TraverserStrategy.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TraverserStrategy.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TripleForLoopTraverser.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TripleForLoopTraverser.java
index 9bbc380f5571..d0992b9a51c1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TripleForLoopTraverser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TripleForLoopTraverser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TripleTraverser.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TripleTraverser.java
index 470b2d4dc0ed..7482e37393af 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TripleTraverser.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/TripleTraverser.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/package-info.java
index 9bb92fb55099..2c151d34c671 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/traverser/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/EdgeStep.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/EdgeStep.java
index 1bc0ee43d336..c31c7d7d4a67 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/EdgeStep.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/EdgeStep.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/EmbeddingWithTiePoint.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/EmbeddingWithTiePoint.java
index 31584860e3a2..c42c4ac42a9e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/EmbeddingWithTiePoint.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/EmbeddingWithTiePoint.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/VertexStep.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/VertexStep.java
index fe9c23a509e1..f91bc7c6cf62 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/VertexStep.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/VertexStep.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/package-info.java
index 3603ba2202d4..0409d20346e3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/package-info.java
index 3f610bb483b9..d77dc6330f04 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulation.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulation.java
index 06b5556fbdae..182ea4621236 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulation.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintDeletion.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintDeletion.java
index f2b45d43cd94..f24c40a5d54d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintDeletion.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintDeletion.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintFatVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintFatVertex.java
index a6a32b42e579..8284fdde1c30 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintFatVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintFatVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintMessage.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintMessage.java
index 285e4a416aca..470ca47c4649 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintMessage.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintMessage.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintTripleWithDirection.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintTripleWithDirection.java
index f209d8717a66..b02ed21cabc7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintTripleWithDirection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/PrintTripleWithDirection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/package-info.java
index 43522f6dc766..b0c81c2d7137 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/debug/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/BuildFatVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/BuildFatVertex.java
index 145b1a7b00b9..cb794ad3f59c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/BuildFatVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/BuildFatVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/CloneAndReverse.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/CloneAndReverse.java
index 27cfba94d656..65843f256c3d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/CloneAndReverse.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/CloneAndReverse.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/CombinedMessages.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/CombinedMessages.java
index 8065572a9662..c72d0d8c9c7a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/CombinedMessages.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/CombinedMessages.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/EdgeTriple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/EdgeTriple.java
index 2174543e1692..a0e8c2247a12 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/EdgeTriple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/EdgeTriple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/GroupedFatVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/GroupedFatVertices.java
index 153118dd69cc..70c7da17d6f7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/GroupedFatVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/GroupedFatVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/GroupedMessages.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/GroupedMessages.java
index 615b2d29c35e..228222ec0920 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/GroupedMessages.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/GroupedMessages.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/UpdateVertexState.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/UpdateVertexState.java
index 53075394b206..b2626bd53d02 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/UpdateVertexState.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/UpdateVertexState.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/UpdatedFatVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/UpdatedFatVertices.java
index cc7d36206a13..87eff41b7165 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/UpdatedFatVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/UpdatedFatVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/ValidFatVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/ValidFatVertices.java
index 70b37ae8c7e0..77c4cf63f18b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/ValidFatVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/ValidFatVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/ValidateNeighborhood.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/ValidateNeighborhood.java
index 750754c00e5f..a2a735f0fb01 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/ValidateNeighborhood.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/ValidateNeighborhood.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/package-info.java
index 7e68e6137911..603793f5810f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/package-info.java
index 9e48b23035ee..ea8aaeb06bb9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/Deletion.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/Deletion.java
index a8cbf97ffe21..1782dbc1bc24 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/Deletion.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/Deletion.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/FatVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/FatVertex.java
index 449683eba736..2f771d9192f9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/FatVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/FatVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/IdPair.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/IdPair.java
index 25ca5843879f..aa097b3e82cc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/IdPair.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/IdPair.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/Message.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/Message.java
index 477eaee4f7bb..b2579296872d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/Message.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/Message.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/TripleWithDirection.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/TripleWithDirection.java
index 7104652d03b7..c5202661b5c3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/TripleWithDirection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/TripleWithDirection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/package-info.java
index 20839849b994..d56f9d18765a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/util/MessageType.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/util/MessageType.java
index 526e02231c64..bb68bfa02b4c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/util/MessageType.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/util/MessageType.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/util/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/util/package-info.java
index bc4aeaf4e9a0..26d48c8033e4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/util/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/util/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/package-info.java
index 0a48b0426f5d..b5cd1a771943 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/TransactionalPatternMatching.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/TransactionalPatternMatching.java
index 2b0d20324555..29d142a55922 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/TransactionalPatternMatching.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/TransactionalPatternMatching.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/DepthSearchMatching.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/DepthSearchMatching.java
index 504991b7e755..be85d3cc370e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/DepthSearchMatching.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/DepthSearchMatching.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/PatternMatchingAlgorithm.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/PatternMatchingAlgorithm.java
index 1238323dad4c..84690db20251 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/PatternMatchingAlgorithm.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/PatternMatchingAlgorithm.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/package-info.java
index 62736cbabbe0..82ffbc1f7f33 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/algorithm/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/AddGraphsToElements.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/AddGraphsToElements.java
index d4c7ac2e4a13..7d7fe40c820b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/AddGraphsToElements.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/AddGraphsToElements.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/AddMatchesToProperties.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/AddMatchesToProperties.java
index 2b6a6c8af4fd..0cc5d3f2c608 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/AddMatchesToProperties.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/AddMatchesToProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildGraphWithCandidates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildGraphWithCandidates.java
index f2483767185e..bc21a3c6413a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildGraphWithCandidates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildGraphWithCandidates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildIdWithCandidatesAndGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildIdWithCandidatesAndGraphs.java
index 613a2b631378..cf439ecdf34c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildIdWithCandidatesAndGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildIdWithCandidatesAndGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildTripleWithCandidatesAndGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildTripleWithCandidatesAndGraphs.java
index 7e22ea4a8e96..578bbe9d4221 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildTripleWithCandidatesAndGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/BuildTripleWithCandidatesAndGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/ExpandFirstField.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/ExpandFirstField.java
index 8dd6920b3658..127232d12713 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/ExpandFirstField.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/ExpandFirstField.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/FindEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/FindEmbeddings.java
index 186e40fa1353..f8e907c3d9e4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/FindEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/FindEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/GraphIdFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/GraphIdFilter.java
index 28b0e17fa1e7..28e3c4063416 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/GraphIdFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/GraphIdFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/GraphTransactionMatcher.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/GraphTransactionMatcher.java
index 8280b6def8f4..7c5a59a5a40f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/GraphTransactionMatcher.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/GraphTransactionMatcher.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/HasEmbeddings.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/HasEmbeddings.java
index 5e0bdf5d2425..606865451095 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/HasEmbeddings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/HasEmbeddings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/InitGraphHeadWithLineage.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/InitGraphHeadWithLineage.java
index 4219fd38690a..3baffb1fb988 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/InitGraphHeadWithLineage.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/InitGraphHeadWithLineage.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/MergeSecondField.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/MergeSecondField.java
index b8c10aa48452..685bfa05d90d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/MergeSecondField.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/MergeSecondField.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/Project4To0And2AndSwitch.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/Project4To0And2AndSwitch.java
index 6a646f0cd181..c29cb9cd1641 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/Project4To0And2AndSwitch.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/Project4To0And2AndSwitch.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/Project4To0And3AndSwitch.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/Project4To0And3AndSwitch.java
index d37243b86552..859654ed5d15 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/Project4To0And3AndSwitch.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/Project4To0And3AndSwitch.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/package-info.java
index da2d499d0aa3..bb038c58dc94 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/function/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/package-info.java
index 251fa0aaff18..4a6c89488e19 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/tuples/GraphWithCandidates.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/tuples/GraphWithCandidates.java
index 9cba62becbc0..535561128c96 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/tuples/GraphWithCandidates.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/tuples/GraphWithCandidates.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/tuples/package-info.java
index b7ee7fb164f4..68a24a65174d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/matching/transactional/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/EdgeNeighborhood.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/EdgeNeighborhood.java
index 7c0ddb686679..a5648f19b4d4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/EdgeNeighborhood.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/EdgeNeighborhood.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/Neighborhood.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/Neighborhood.java
index c6992ad255fa..014e799cdbf3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/Neighborhood.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/Neighborhood.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/ReduceEdgeNeighborhood.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/ReduceEdgeNeighborhood.java
index a538b23e733f..cac59102af30 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/ReduceEdgeNeighborhood.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/ReduceEdgeNeighborhood.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/ReduceVertexNeighborhood.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/ReduceVertexNeighborhood.java
index 41f66dc16ffa..cfac28982da5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/ReduceVertexNeighborhood.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/ReduceVertexNeighborhood.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/VertexNeighborhood.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/VertexNeighborhood.java
index 686328e5a9ee..6702e2ee9c1a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/VertexNeighborhood.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/VertexNeighborhood.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborEdgeFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborEdgeFunction.java
index b6fdc8ca27cd..dfbdabbc3048 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborEdgeFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborEdgeFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborEdgeReduceFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborEdgeReduceFunction.java
index 9d6eb36b6daf..53d009b0e4e2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborEdgeReduceFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborEdgeReduceFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborFunction.java
index 2452b1da67cd..41ed6ed83af4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborVertexFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborVertexFunction.java
index b81b613b548e..7dfa3a4b031d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborVertexFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborVertexFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborVertexReduceFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborVertexReduceFunction.java
index 11670b7e9026..d1ca969b66b1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborVertexReduceFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/NeighborVertexReduceFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/ShuffledVertexIdsFromEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/ShuffledVertexIdsFromEdge.java
index df5e2a78dada..060861f8dacf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/ShuffledVertexIdsFromEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/ShuffledVertexIdsFromEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexIdsFromEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexIdsFromEdge.java
index 6aca9057e41b..1507880c8b0a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexIdsFromEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexIdsFromEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexIdsWithEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexIdsWithEdge.java
index 3010cb0c2072..657bb08b56c0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexIdsWithEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexIdsWithEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexToFieldOne.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexToFieldOne.java
index db770482dbab..c606a308f70a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexToFieldOne.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexToFieldOne.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexToFieldZero.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexToFieldZero.java
index 0dd2bf5b839e..90f394cc27f8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexToFieldZero.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/VertexToFieldZero.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/package-info.java
index 78b575d2a2b3..725de37946c9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/keyselector/IdInTuple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/keyselector/IdInTuple.java
index c7e1137fe619..d1c045e56766 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/keyselector/IdInTuple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/keyselector/IdInTuple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/keyselector/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/keyselector/package-info.java
index 0b9a76919066..e1470ace2dcc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/keyselector/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/keyselector/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/package-info.java
index 656ea7ef3b78..654b8c9ff688 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/neighborhood/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/Overlap.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/Overlap.java
index 07f32b943107..3cd762782a86 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/Overlap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/Overlap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/OverlapBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/OverlapBase.java
index dc65c4715ed4..b9c4816ec8cd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/OverlapBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/OverlapBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/ReduceOverlap.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/ReduceOverlap.java
index 263115793174..661da560e80a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/ReduceOverlap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/ReduceOverlap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/package-info.java
index 371cac5962b8..635ca8d1dc91 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/overlap/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/package-info.java
index 686170c881d8..fcbd36a5ebbd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/EdgeRollUp.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/EdgeRollUp.java
index ea4696bb2f41..81081bc993b5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/EdgeRollUp.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/EdgeRollUp.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/RollUp.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/RollUp.java
index 525411b6312e..177d3dc5ed69 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/RollUp.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/RollUp.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/VertexRollUp.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/VertexRollUp.java
index a2623b2b4f72..a130e477993e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/VertexRollUp.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/VertexRollUp.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/package-info.java
index 847449e29515..64facc07332c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/rollup/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/PageRankSampling.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/PageRankSampling.java
index 25f2f2249890..ece582accc4a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/PageRankSampling.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/PageRankSampling.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomEdgeSampling.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomEdgeSampling.java
index 7d2820fe987c..458b84d9b219 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomEdgeSampling.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomEdgeSampling.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomLimitedDegreeVertexSampling.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomLimitedDegreeVertexSampling.java
index 20d7609c6655..5ba505b858c6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomLimitedDegreeVertexSampling.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomLimitedDegreeVertexSampling.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomNonUniformVertexSampling.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomNonUniformVertexSampling.java
index d19f8a027d0c..a96919c472c7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomNonUniformVertexSampling.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomNonUniformVertexSampling.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexEdgeSampling.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexEdgeSampling.java
index be3242ff0f21..2cebac8fda7d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexEdgeSampling.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexEdgeSampling.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexNeighborhoodSampling.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexNeighborhoodSampling.java
index d9e171800eb9..b028374ab916 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexNeighborhoodSampling.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexNeighborhoodSampling.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexSampling.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexSampling.java
index 25ffe1e4c809..e9234a4d4681 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexSampling.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexSampling.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomWalkSampling.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomWalkSampling.java
index 7e8610d36b06..15a396a5fe2b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomWalkSampling.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/RandomWalkSampling.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/SamplingAlgorithm.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/SamplingAlgorithm.java
index 6ba7821b6cfc..8acf366f0d34 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/SamplingAlgorithm.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/SamplingAlgorithm.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/SamplingConstants.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/SamplingConstants.java
index e8e4d59d8e43..ebfe04e6a3f0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/SamplingConstants.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/SamplingConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/SamplingEvaluationConstants.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/SamplingEvaluationConstants.java
index 2991f0e6a916..5bd1120998cd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/SamplingEvaluationConstants.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/SamplingEvaluationConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/package-info.java
index fb3a7a58f37e..d892fa58a41c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/common/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/AddMaxDegreeCrossFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/AddMaxDegreeCrossFunction.java
index 58d49a61c4f1..1510b2e0da41 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/AddMaxDegreeCrossFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/AddMaxDegreeCrossFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/AddPageRankScoresToVertexCrossFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/AddPageRankScoresToVertexCrossFunction.java
index 0f3fbd3d4e4e..51614933cbbf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/AddPageRankScoresToVertexCrossFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/AddPageRankScoresToVertexCrossFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeSourceVertexJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeSourceVertexJoin.java
index d2ef0c71f441..ce7ed355e1f8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeSourceVertexJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeSourceVertexJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeTargetVertexJoin.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeTargetVertexJoin.java
index a739bfd43123..264988eb266b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeTargetVertexJoin.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeTargetVertexJoin.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeWithSourceTarget.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeWithSourceTarget.java
index 4b4c1c6e5d21..b51a4cd9bdbb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeWithSourceTarget.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgeWithSourceTarget.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgesWithSampledVerticesFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgesWithSampledVerticesFilter.java
index 0f92e7ac6850..ba7e8fe95c86 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgesWithSampledVerticesFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/EdgesWithSampledVerticesFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/FilterVerticesWithDegreeOtherThanGiven.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/FilterVerticesWithDegreeOtherThanGiven.java
index ea1b4cde3a49..c03c36882b4a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/FilterVerticesWithDegreeOtherThanGiven.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/FilterVerticesWithDegreeOtherThanGiven.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/LimitedDegreeVertexRandomFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/LimitedDegreeVertexRandomFilter.java
index 4baea7abeed5..d31c31d1966f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/LimitedDegreeVertexRandomFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/LimitedDegreeVertexRandomFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/Neighborhood.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/Neighborhood.java
index 6f2be6687f15..b7089767125f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/Neighborhood.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/Neighborhood.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/NonUniformVertexRandomFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/NonUniformVertexRandomFilter.java
index 3015c9d2d8f5..7bf67d31cbb1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/NonUniformVertexRandomFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/NonUniformVertexRandomFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/PageRankResultVertexFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/PageRankResultVertexFilter.java
index 1be94bf3bb4e..5c04600b0420 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/PageRankResultVertexFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/PageRankResultVertexFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/RandomFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/RandomFilter.java
index b27078c84929..c2dadaabc180 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/RandomFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/RandomFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/RandomVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/RandomVertex.java
index 69993263faba..6533b579df1e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/RandomVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/RandomVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexDegree.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexDegree.java
index 8d89a076aaf0..8b98493c7719 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexDegree.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexDegree.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexToDegreeMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexToDegreeMap.java
index b53a15683465..3a1bc908fb79 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexToDegreeMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexToDegreeMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexWithDegreeFilter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexWithDegreeFilter.java
index 5d3c86057dde..5a926aa7c89e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexWithDegreeFilter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/VertexWithDegreeFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/package-info.java
index 535261b827a1..d1e173611414 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/package-info.java
index 7497bc06ba14..cc6176e41426 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/sampling/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/Selection.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/Selection.java
index 396091e6a04e..998fe8311c6d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/Selection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/Selection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/SelectionBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/SelectionBase.java
index acface64584d..a8752d5db166 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/SelectionBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/SelectionBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/functions/FilterTransactions.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/functions/FilterTransactions.java
index 016afe290798..d77b98159fd4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/functions/FilterTransactions.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/functions/FilterTransactions.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/functions/package-info.java
index d9dc0e357030..f74306303f49 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/package-info.java
index 2373e5dceefd..9861cf765af7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/selection/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/Split.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/Split.java
index d22f88d88432..7a7f370c59f1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/Split.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/Split.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/AddNewGraphsToEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/AddNewGraphsToEdge.java
index c1a0d1f6b66f..84186dba43aa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/AddNewGraphsToEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/AddNewGraphsToEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/AddNewGraphsToVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/AddNewGraphsToVertex.java
index c1fa22742206..035c91f2af04 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/AddNewGraphsToVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/AddNewGraphsToVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/EdgeToTriple.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/EdgeToTriple.java
index 0d9ac25bfac5..d92688e8bfca 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/EdgeToTriple.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/EdgeToTriple.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinEdgeTupleWithSourceGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinEdgeTupleWithSourceGraphs.java
index 61a34e4a86c7..d070ad7afe4a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinEdgeTupleWithSourceGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinEdgeTupleWithSourceGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinEdgeTupleWithTargetGraphs.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinEdgeTupleWithTargetGraphs.java
index c976408ee217..611285461773 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinEdgeTupleWithTargetGraphs.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinEdgeTupleWithTargetGraphs.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinVertexIdWithGraphIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinVertexIdWithGraphIds.java
index 4309c697828b..b7f03fa73c8a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinVertexIdWithGraphIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/JoinVertexIdWithGraphIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/MultipleGraphIdsGroupReducer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/MultipleGraphIdsGroupReducer.java
index 66a235039a76..88b9945dac9a 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/MultipleGraphIdsGroupReducer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/MultipleGraphIdsGroupReducer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/SplitValues.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/SplitValues.java
index 154eeec8ae61..05e3c7dc3647 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/SplitValues.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/SplitValues.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/package-info.java
index 564abb672946..74ae2801a305 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/package-info.java
index d2752fc431ec..5a81990de582 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/split/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageClusteringCoefficient.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageClusteringCoefficient.java
index 55ad6a577373..05e89e21a737 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageClusteringCoefficient.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageClusteringCoefficient.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageDegree.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageDegree.java
index 22529408e37c..f3697551cb06 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageDegree.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageDegree.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageIncomingDegree.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageIncomingDegree.java
index 29a3bed3125f..e6d8e0702de3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageIncomingDegree.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageIncomingDegree.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageOutgoingDegree.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageOutgoingDegree.java
index b24c6ad20264..e2c54a87bf26 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageOutgoingDegree.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/AverageOutgoingDegree.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ConnectedComponentsDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ConnectedComponentsDistribution.java
index 353b0db786d5..bfd2f451d6ae 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ConnectedComponentsDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ConnectedComponentsDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ConnectedComponentsDistributionAsValues.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ConnectedComponentsDistributionAsValues.java
index 4a5000e44188..d3578ad6893d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ConnectedComponentsDistributionAsValues.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ConnectedComponentsDistributionAsValues.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DegreeCentrality.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DegreeCentrality.java
index 9416511f16e3..ae1124a17184 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DegreeCentrality.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DegreeCentrality.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DegreeCentralityBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DegreeCentralityBase.java
index 7c89797532f9..0a690c21f974 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DegreeCentralityBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DegreeCentralityBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctEdgeProperties.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctEdgeProperties.java
index 65514a0607ea..d08a1b867cbf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctEdgeProperties.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctEdgeProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctEdgePropertiesByLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctEdgePropertiesByLabel.java
index 22a8bffc91a3..773e03f9c696 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctEdgePropertiesByLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctEdgePropertiesByLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctProperties.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctProperties.java
index 3cbfc44d43e7..85dc4270eca1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctProperties.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctSourceIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctSourceIds.java
index d350fbe8f550..c4b782d4cdd7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctSourceIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctSourceIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctSourceIdsByEdgeLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctSourceIdsByEdgeLabel.java
index 8bfbf1a21564..5730a253e617 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctSourceIdsByEdgeLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctSourceIdsByEdgeLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctTargetIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctTargetIds.java
index 5edfa77ba31f..fa47b0b6fe02 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctTargetIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctTargetIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctTargetIdsByEdgeLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctTargetIdsByEdgeLabel.java
index e17d0c2da67a..1c125a03cb12 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctTargetIdsByEdgeLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctTargetIdsByEdgeLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctVertexProperties.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctVertexProperties.java
index dc29106dbf44..9f4f04494a5d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctVertexProperties.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctVertexProperties.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctVertexPropertiesByLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctVertexPropertiesByLabel.java
index c7b6ba93cd8c..d416601bcadb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctVertexPropertiesByLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/DistinctVertexPropertiesByLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeCount.java
index b4750c04adbc..dd4d43361c74 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeLabelDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeLabelDistribution.java
index 63babff33406..80b8754a0f41 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeLabelDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeLabelDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeValueDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeValueDistribution.java
index e5dfcd67faaf..cf3cb49e81c1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeValueDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/EdgeValueDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/GraphDensity.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/GraphDensity.java
index 9f6f5d917dec..70b7a9aa31b4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/GraphDensity.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/GraphDensity.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/IncomingVertexDegreeDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/IncomingVertexDegreeDistribution.java
index 6ff949dfb2d3..0f98c6feab5c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/IncomingVertexDegreeDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/IncomingVertexDegreeDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/IncomingVertexDegrees.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/IncomingVertexDegrees.java
index 77419ccfee34..c905f17ce243 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/IncomingVertexDegrees.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/IncomingVertexDegrees.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/OutgoingVertexDegreeDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/OutgoingVertexDegreeDistribution.java
index d96bc7f584d7..4db07f99e834 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/OutgoingVertexDegreeDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/OutgoingVertexDegreeDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/OutgoingVertexDegrees.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/OutgoingVertexDegrees.java
index de436f644f06..6267c2123978 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/OutgoingVertexDegrees.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/OutgoingVertexDegrees.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/SourceLabelAndEdgeLabelDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/SourceLabelAndEdgeLabelDistribution.java
index 2e5a182d4509..b10109cdaa4d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/SourceLabelAndEdgeLabelDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/SourceLabelAndEdgeLabelDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/TargetLabelAndEdgeLabelDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/TargetLabelAndEdgeLabelDistribution.java
index 1e74f0817d4f..dbf729376658 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/TargetLabelAndEdgeLabelDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/TargetLabelAndEdgeLabelDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ValueDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ValueDistribution.java
index 383a0186e0ce..a96440d43cf1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ValueDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/ValueDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexCount.java
index 42c206766ad6..f042b74c2842 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexDegreeDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexDegreeDistribution.java
index d5906c0150eb..4152a5862283 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexDegreeDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexDegreeDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexDegrees.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexDegrees.java
index 7606aef85280..549c031e5943 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexDegrees.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexDegrees.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexLabelDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexLabelDistribution.java
index ee1a06ea67b9..c7c9aab8d088 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexLabelDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexLabelDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexValueDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexValueDistribution.java
index 91704ad9725b..f88c15a83138 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexValueDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/VertexValueDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AddSumDegreesToGraphHeadCrossFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AddSumDegreesToGraphHeadCrossFunction.java
index cc5ececf92be..303a3feee760 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AddSumDegreesToGraphHeadCrossFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AddSumDegreesToGraphHeadCrossFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AggregateListOfWccEdges.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AggregateListOfWccEdges.java
index c1c3eb70e0fc..5029732b28c9 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AggregateListOfWccEdges.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AggregateListOfWccEdges.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AggregateListOfWccVertices.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AggregateListOfWccVertices.java
index 0a1f79b0a2e5..64756bdfe98c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AggregateListOfWccVertices.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/AggregateListOfWccVertices.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/BothLabels.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/BothLabels.java
index c34051e174cd..807aac4db4b5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/BothLabels.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/BothLabels.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateAverageDegree.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateAverageDegree.java
index 99a8368bef59..bbc4ebce4922 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateAverageDegree.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateAverageDegree.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateDegreeCentrality.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateDegreeCentrality.java
index d0400930be03..36c0a4c66f87 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateDegreeCentrality.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateDegreeCentrality.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateDensity.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateDensity.java
index 00aa493b43d7..264d0ac844c3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateDensity.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CalculateDensity.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CombinePropertyValueDistribution.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CombinePropertyValueDistribution.java
index 0651ccfafc09..359ab40739bc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CombinePropertyValueDistribution.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/CombinePropertyValueDistribution.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/DegreeDistanceFunction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/DegreeDistanceFunction.java
index b44e4a518fd3..29cce8999e7c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/DegreeDistanceFunction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/DegreeDistanceFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ExtractPropertyValues.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ExtractPropertyValues.java
index c7bc2413ea33..33310a4a0491 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ExtractPropertyValues.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ExtractPropertyValues.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ExtractPropertyValuesByLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ExtractPropertyValuesByLabel.java
index b8a9ead4d11f..f3babc1602ce 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ExtractPropertyValuesByLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ExtractPropertyValuesByLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/GetConnectedComponentDistributionFlatMap.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/GetConnectedComponentDistributionFlatMap.java
index 2163ead5f5e5..684720d958f6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/GetConnectedComponentDistributionFlatMap.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/GetConnectedComponentDistributionFlatMap.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/SetOrCreateWithCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/SetOrCreateWithCount.java
index d13206b26f3c..f1a4d055dfed 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/SetOrCreateWithCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/SetOrCreateWithCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/SumCounts.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/SumCounts.java
index 044574f5af82..d96d0ac63543 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/SumCounts.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/SumCounts.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ToSourceIdWithLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ToSourceIdWithLabel.java
index b417b47d593b..964412f1dfd0 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ToSourceIdWithLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ToSourceIdWithLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ToTargetIdWithLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ToTargetIdWithLabel.java
index 9a73a872d565..d42a4aec59bc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ToTargetIdWithLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/ToTargetIdWithLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/package-info.java
index 2360a31d318e..da4cdf13652f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/package-info.java
index 57dae4c0bd1b..b28d2c00421c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctEdgePropertiesByLabelPreparer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctEdgePropertiesByLabelPreparer.java
index 2e78f03fb2fa..75d54d9770fa 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctEdgePropertiesByLabelPreparer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctEdgePropertiesByLabelPreparer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctSourceVertexCountPreparer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctSourceVertexCountPreparer.java
index f4fa779f0e75..f549b28eab9f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctSourceVertexCountPreparer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctSourceVertexCountPreparer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctTargetVertexCountPreparer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctTargetVertexCountPreparer.java
index edb5305c7e7e..a7cf3cd8070b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctTargetVertexCountPreparer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctTargetVertexCountPreparer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctVertexPropertiesByLabelPreparer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctVertexPropertiesByLabelPreparer.java
index 833ff503b3db..24c20ce5ef3e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctVertexPropertiesByLabelPreparer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/DistinctVertexPropertiesByLabelPreparer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/EdgeCountPreparer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/EdgeCountPreparer.java
index e210a870873d..ac51c0c77fa1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/EdgeCountPreparer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/EdgeCountPreparer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/SourceAndEdgeLabelDistributionPreparer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/SourceAndEdgeLabelDistributionPreparer.java
index 1a9aaf0d9b2a..c098944cfeec 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/SourceAndEdgeLabelDistributionPreparer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/SourceAndEdgeLabelDistributionPreparer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/StatisticWriter.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/StatisticWriter.java
index 994de51173e4..11c9fbbc3b68 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/StatisticWriter.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/StatisticWriter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/TargetAndEdgeLabelDistributionPreparer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/TargetAndEdgeLabelDistributionPreparer.java
index 69eab5beb1d9..04a1183f1010 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/TargetAndEdgeLabelDistributionPreparer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/TargetAndEdgeLabelDistributionPreparer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/VertexCountPreparer.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/VertexCountPreparer.java
index 9c77ad323e64..9c99b6f7c1da 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/VertexCountPreparer.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/VertexCountPreparer.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/package-info.java
index 2976ee7706e6..108260d3ff45 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/statistics/writer/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/ApplySubgraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/ApplySubgraph.java
index 943d33ec4c60..dc3a5aaefa9f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/ApplySubgraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/ApplySubgraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/Subgraph.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/Subgraph.java
index a72730939547..2beaaf48ca56 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/Subgraph.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/Subgraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/EdgeToSourceAndTargetId.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/EdgeToSourceAndTargetId.java
index d265d6cc0cef..d44f5c4f324b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/EdgeToSourceAndTargetId.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/EdgeToSourceAndTargetId.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/EdgeToSourceAndTargetIdWithGraphIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/EdgeToSourceAndTargetIdWithGraphIds.java
index 3aeae3788d00..d193bbe4c676 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/EdgeToSourceAndTargetIdWithGraphIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/EdgeToSourceAndTargetIdWithGraphIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/RightSideWithLeftGraphs2To1.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/RightSideWithLeftGraphs2To1.java
index 9bdab7842ff1..7ba8b45be042 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/RightSideWithLeftGraphs2To1.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/RightSideWithLeftGraphs2To1.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/package-info.java
index 2e8a2e34d11e..b20ff9a97385 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/package-info.java
index 6d683de0f31a..2cd0e2644bff 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/subgraph/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/CanonicalAdjacencyMatrixBuilder.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/CanonicalAdjacencyMatrixBuilder.java
index a23b85c052c7..0a0dcca22e82 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/CanonicalAdjacencyMatrixBuilder.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/CanonicalAdjacencyMatrixBuilder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/EdgeToString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/EdgeToString.java
index e49b69de192c..496ba2ff8f00 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/EdgeToString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/EdgeToString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/GraphHeadToString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/GraphHeadToString.java
index 1c92fa1e0601..441a0906718f 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/GraphHeadToString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/GraphHeadToString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/VertexToString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/VertexToString.java
index 0f6bffc68cd6..0c6d454855f7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/VertexToString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/VertexToString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/package-info.java
index 93ca0547b095..d592ef0ca23e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/AdjacencyMatrix.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/AdjacencyMatrix.java
index 889de554aeb1..7aa2c83456f5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/AdjacencyMatrix.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/AdjacencyMatrix.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/ConcatGraphHeadStrings.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/ConcatGraphHeadStrings.java
index 180958f04c84..48dcf5c7b985 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/ConcatGraphHeadStrings.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/ConcatGraphHeadStrings.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/EdgeToDataString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/EdgeToDataString.java
index a6135cc0bd15..98fdde327101 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/EdgeToDataString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/EdgeToDataString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/EdgeToIdString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/EdgeToIdString.java
index 642ba1aed479..e5f765bd75d8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/EdgeToIdString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/EdgeToIdString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/ElementToDataString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/ElementToDataString.java
index 4ea960471528..8f85c13e1551 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/ElementToDataString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/ElementToDataString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToDataString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToDataString.java
index 3287a5b812c8..cf151f69ad82 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToDataString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToDataString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToEmptyString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToEmptyString.java
index 6642f7f69ec2..6bcd793e0fe1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToEmptyString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToEmptyString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToIdString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToIdString.java
index 3af3f7ef2ab3..67f4b6980fd2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToIdString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/GraphHeadToIdString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/IncomingAdjacencyList.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/IncomingAdjacencyList.java
index 748f0f56ce0e..4ba8f44fcf65 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/IncomingAdjacencyList.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/IncomingAdjacencyList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/MultiEdgeStringCombiner.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/MultiEdgeStringCombiner.java
index 4aa17664c11d..e9eb2173a234 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/MultiEdgeStringCombiner.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/MultiEdgeStringCombiner.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/OutgoingAdjacencyList.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/OutgoingAdjacencyList.java
index 611a2e8fc60e..47af3678b977 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/OutgoingAdjacencyList.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/OutgoingAdjacencyList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/SourceStringUpdater.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/SourceStringUpdater.java
index 553206010634..08c7e7115a78 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/SourceStringUpdater.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/SourceStringUpdater.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/SwitchSourceTargetIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/SwitchSourceTargetIds.java
index daf3b3f1964e..60f28b6f841d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/SwitchSourceTargetIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/SwitchSourceTargetIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/TargetStringUpdater.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/TargetStringUpdater.java
index 317e40ac3dc5..875f26ebeaf3 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/TargetStringUpdater.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/TargetStringUpdater.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/UndirectedAdjacencyList.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/UndirectedAdjacencyList.java
index 297a4e0dd567..ccea9cbf4b22 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/UndirectedAdjacencyList.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/UndirectedAdjacencyList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/VertexToDataString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/VertexToDataString.java
index d5a283d196d5..c5a7f4e7afba 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/VertexToDataString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/VertexToDataString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/VertexToIdString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/VertexToIdString.java
index 606dbed56f70..e28c23a74c43 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/VertexToIdString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/VertexToIdString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/package-info.java
index acb5258761af..f022e2a45813 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/package-info.java
index 0d8cba26e34f..b6f96b7e5050 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/EdgeString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/EdgeString.java
index 6aa32cd6210c..3e3c768eb5df 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/EdgeString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/EdgeString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/GraphHeadString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/GraphHeadString.java
index 3589f9f4bc06..cfe27a28d71c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/GraphHeadString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/GraphHeadString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/VertexString.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/VertexString.java
index fbee1fd1c807..3d62b954e957 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/VertexString.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/VertexString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/package-info.java
index 809dc21ffc22..f078e737c3ac 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/tostring/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformation.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformation.java
index 31ec4491e545..eec19c598fc7 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformation.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/Transformation.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/Transformation.java
index 257ce722dea6..81d418f4d433 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/Transformation.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/Transformation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformBase.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformBase.java
index da8005b23b04..df60adce77ed 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformBase.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformEdge.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformEdge.java
index a2054192da8c..33d1e2daaff5 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformEdge.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformGraphHead.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformGraphHead.java
index ce7d6fff4010..2b409f5c8336 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformGraphHead.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformGraphTransaction.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformGraphTransaction.java
index f8b456e549fc..9d080a16decc 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformGraphTransaction.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformGraphTransaction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformVertex.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformVertex.java
index b24364b69378..b8775017063d 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformVertex.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/TransformVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/package-info.java
index d875ba4ff51f..c412acc3f2be 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/package-info.java
index c4b2bbe84086..62afd108c32c 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/transformation/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/union/Union.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/union/Union.java
index 0afeb0c83080..6d6e133f87b8 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/union/Union.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/union/Union.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/union/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/union/package-info.java
index a5832feeb0c1..c80097061bd1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/union/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/union/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/Verify.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/Verify.java
index 6363512f787e..aa44c42db9b6 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/Verify.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/Verify.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyCollection.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyCollection.java
index b80e63c2dcd5..6160bb8635cd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyCollection.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyCollection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyGraphContainment.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyGraphContainment.java
index d293fbe69049..dd5deb0ecbbd 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyGraphContainment.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyGraphContainment.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyGraphsContainment.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyGraphsContainment.java
index b96d70b3731c..c2b6f778de48 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyGraphsContainment.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/VerifyGraphsContainment.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/functions/RemoveDanglingGraphIds.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/functions/RemoveDanglingGraphIds.java
index c6ab5d0745cc..961bdd6e4c69 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/functions/RemoveDanglingGraphIds.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/functions/RemoveDanglingGraphIds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/functions/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/functions/package-info.java
index ece7b6287cb4..0d972919f06e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/functions/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/package-info.java
index 3e430fe3969f..cd9d6e3a8ca1 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/operators/verify/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/package-info.java
index 6a458a0c54d2..f8765e149d52 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/IdWithIdSet.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/IdWithIdSet.java
index f3f4489bc54f..c3e0d6d5b035 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/IdWithIdSet.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/IdWithIdSet.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/IdWithLabel.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/IdWithLabel.java
index f77b83eb0afe..48084537c769 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/IdWithLabel.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/IdWithLabel.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/WithCount.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/WithCount.java
index 5f06c21bbde6..b2558f191faf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/WithCount.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/WithCount.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/package-info.java
index 3db096a616c9..1f46b43f5217 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/model/impl/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListCell.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListCell.java
index ca177e4af9a3..06194139aec2 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListCell.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListCell.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListCellComparator.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListCellComparator.java
index 4802e96406ed..87e723411379 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListCellComparator.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListCellComparator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListRow.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListRow.java
index e727897e5c8a..aa80bafea1bf 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListRow.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/AdjacencyListRow.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/package-info.java
index 73fbce32a260..6fbf6a40caec 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/common/adjacencylist/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/package-info.java
index 4ff5b5f8e655..71641d37eaae 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/AdjacencyList.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/AdjacencyList.java
index bf5b49f80ad8..9cef2070d57e 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/AdjacencyList.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/AdjacencyList.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/RepresentationConverters.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/RepresentationConverters.java
index 22046a075a19..2b4df8cdf443 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/RepresentationConverters.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/RepresentationConverters.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/package-info.java
index 4dcdcaf9039c..66e0b3958600 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/Traversal.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/Traversal.java
index b1191495e8a6..7e9546357172 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/Traversal.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/Traversal.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/TraversalCode.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/TraversalCode.java
index d71313ee6da2..794a20a53259 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/TraversalCode.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/TraversalCode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/TraversalEmbedding.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/TraversalEmbedding.java
index 776e5a072f83..d299c029b9a4 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/TraversalEmbedding.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/TraversalEmbedding.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/package-info.java
index 011d034b8096..3b0e7d937f04 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/representation/transactional/traversalcode/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/util/FlinkAsciiGraphLoader.java b/gradoop-flink/src/main/java/org/gradoop/flink/util/FlinkAsciiGraphLoader.java
index e173630d9201..6473bac29910 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/util/FlinkAsciiGraphLoader.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/util/FlinkAsciiGraphLoader.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/util/GradoopFlinkConfig.java b/gradoop-flink/src/main/java/org/gradoop/flink/util/GradoopFlinkConfig.java
index 290a0dbf5af7..cabff27f892b 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/util/GradoopFlinkConfig.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/util/GradoopFlinkConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/main/java/org/gradoop/flink/util/package-info.java b/gradoop-flink/src/main/java/org/gradoop/flink/util/package-info.java
index e73d03a85214..05b912d4dffb 100644
--- a/gradoop-flink/src/main/java/org/gradoop/flink/util/package-info.java
+++ b/gradoop-flink/src/main/java/org/gradoop/flink/util/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/btgs/BusinessTransactionGraphsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/btgs/BusinessTransactionGraphsTest.java
index 6487bd8559ec..50605593172a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/btgs/BusinessTransactionGraphsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/btgs/BusinessTransactionGraphsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsDIMSpanTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsDIMSpanTest.java
index 06561cfe3266..026ea5719da7 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsDIMSpanTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsDIMSpanTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsData.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsData.java
index 04ffc5c1cd68..e2bd4555bb1d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsData.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsThinkLikeAnEmbeddingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsThinkLikeAnEmbeddingTest.java
index 6d535dff99c0..082859c57c3c 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsThinkLikeAnEmbeddingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsThinkLikeAnEmbeddingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsTransactionalFSMTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsTransactionalFSMTestBase.java
index 648383f1f4e2..12fbd21dcb73 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsTransactionalFSMTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/fsm/transactional/basic/BasicPatternsTransactionalFSMTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyClusteringCoefficientTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyClusteringCoefficientTestBase.java
index 9a52e508e170..0b1b4b12406d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyClusteringCoefficientTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyClusteringCoefficientTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientDirectedTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientDirectedTest.java
index 9da27139fc5d..b53499a9ab4a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientDirectedTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientDirectedTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientUndirectedTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientUndirectedTest.java
index 4b897d21e20e..e7e29c7ea7c4 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientUndirectedTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyGlobalClusteringCoefficientUndirectedTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientDirectedTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientDirectedTest.java
index e6201bbc4fbe..76ce5d16cddd 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientDirectedTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientDirectedTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientUndirectedTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientUndirectedTest.java
index d3aae0902a78..087d0d79abc7 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientUndirectedTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/clusteringcoefficient/GellyLocalClusteringCoefficientUndirectedTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/WeaklyConnectedComponentsAsCollectionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/WeaklyConnectedComponentsAsCollectionTest.java
index 0cbfb093f931..cbc1b20e8b7b 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/WeaklyConnectedComponentsAsCollectionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/connectedcomponents/WeaklyConnectedComponentsAsCollectionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/hits/HITSTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/hits/HITSTest.java
index b70f2580b6c7..64131787894b 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/hits/HITSTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/hits/HITSTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GradoopLabelPropagationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GradoopLabelPropagationTest.java
index 79ef6fe937a9..8ce77d450d25 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GradoopLabelPropagationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/labelpropagation/GradoopLabelPropagationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/pagerank/PageRankTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/pagerank/PageRankTest.java
index a8b49145975c..2a3c5f533a3f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/pagerank/PageRankTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/pagerank/PageRankTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/randomjump/KRandomJumpGellyVCITest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/randomjump/KRandomJumpGellyVCITest.java
index 1bc76d425577..f09db3ebd493 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/randomjump/KRandomJumpGellyVCITest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/randomjump/KRandomJumpGellyVCITest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/shortestpaths/SingleSourceShortestPathsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/shortestpaths/SingleSourceShortestPathsTest.java
index f2fd76eff13a..80bfee152938 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/shortestpaths/SingleSourceShortestPathsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/shortestpaths/SingleSourceShortestPathsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/trianglecounting/GellyTriangleCountingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/trianglecounting/GellyTriangleCountingTest.java
index 32bb056117ec..8bfbe6a02207 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/trianglecounting/GellyTriangleCountingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/trianglecounting/GellyTriangleCountingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/DistinctVertexDegreesTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/DistinctVertexDegreesTest.java
index 5d49b3f925ec..5701ba25121d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/DistinctVertexDegreesTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/algorithms/gelly/vertexdegrees/DistinctVertexDegreesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVDataSinkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVDataSinkTest.java
index 876c8bccbccb..be579eccfd87 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVDataSinkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVDataSinkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVDataSourceTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVDataSourceTest.java
index d499fad6d571..689b436c7bf9 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVDataSourceTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVDataSourceTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVTestBase.java
index 1e176547d6d8..b2f1488346df 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/CSVTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/functions/StringEscaperTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/functions/StringEscaperTest.java
index e14f9a67c480..80ccef57a83d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/functions/StringEscaperTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/functions/StringEscaperTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSinkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSinkTest.java
index 31b90da3bedc..e2323ff368ed 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSinkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSinkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSourceTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSourceTest.java
index 5be4ab186ef1..cff36f51dcd3 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSourceTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/csv/indexed/IndexedCSVDataSourceTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/dot/DOTDataSinkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/dot/DOTDataSinkTest.java
index 02edd4a9689e..482a2ecf65a6 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/dot/DOTDataSinkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/dot/DOTDataSinkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatSimpleTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatSimpleTest.java
index 484321ad1821..cef89461a8f3 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatSimpleTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/dot/functions/DotFileFormatSimpleTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/edgelist/EdgeListDataSourceTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/edgelist/EdgeListDataSourceTest.java
index 05c20d8f9d2f..8155f421f86e 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/edgelist/EdgeListDataSourceTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/edgelist/EdgeListDataSourceTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/edgelist/VertexLabeledEdgeListDataSourceTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/edgelist/VertexLabeledEdgeListDataSourceTest.java
index 86061c15a3c6..80c4c2589ea0 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/edgelist/VertexLabeledEdgeListDataSourceTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/edgelist/VertexLabeledEdgeListDataSourceTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/gdl/GDLDataSinkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/gdl/GDLDataSinkTest.java
index 6ca357162815..d881c488a9c7 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/gdl/GDLDataSinkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/gdl/GDLDataSinkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/graph/GraphDataSourceTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/graph/GraphDataSourceTest.java
index 3f779b7c6cc5..ce72c8bc7b84 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/graph/GraphDataSourceTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/graph/GraphDataSourceTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/statistics/GraphStatisticsDataSinkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/statistics/GraphStatisticsDataSinkTest.java
index 99d4523a0d23..b995f65d05ba 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/statistics/GraphStatisticsDataSinkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/statistics/GraphStatisticsDataSinkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/tlf/TLFDataSinkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/tlf/TLFDataSinkTest.java
index b5179bd94332..5498c9e83d78 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/tlf/TLFDataSinkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/tlf/TLFDataSinkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/tlf/TLFDataSourceTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/tlf/TLFDataSourceTest.java
index 4e1f33b4816b..e4c372790dd2 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/tlf/TLFDataSourceTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/io/impl/tlf/TLFDataSourceTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/GradoopFlinkTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/GradoopFlinkTestBase.java
index c233e61e9186..fe4b46b6e7ec 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/GradoopFlinkTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/GradoopFlinkTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/GradoopFlinkTestUtils.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/GradoopFlinkTestUtils.java
index e319e47854ff..e0d67e37c91d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/GradoopFlinkTestUtils.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/GradoopFlinkTestUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/GraphTransactionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/GraphTransactionTest.java
index 899f99187fe2..661c33f6e0bc 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/GraphTransactionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/GraphTransactionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/LogicalGraphTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/LogicalGraphTest.java
index 9031fd865aab..de6611b05d2a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/LogicalGraphTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/LogicalGraphTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/epgm/GraphCollectionFactoryTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/epgm/GraphCollectionFactoryTest.java
index ae2e7c9c834f..20e1c5c23f5f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/epgm/GraphCollectionFactoryTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/epgm/GraphCollectionFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/LabelIsInTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/LabelIsInTest.java
index 83d13896f2ae..8bb9ef79104c 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/LabelIsInTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/LabelIsInTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RemovePropertiesTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RemovePropertiesTest.java
index eec2216a38da..5c1281c8d6fd 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RemovePropertiesTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RemovePropertiesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RenameLabelTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RenameLabelTest.java
index c017546bba61..fd5f42285ece 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RenameLabelTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RenameLabelTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RenamePropertyKeysTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RenamePropertyKeysTest.java
index 1aab60f45a58..458a15283499 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RenamePropertyKeysTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/RenamePropertyKeysTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/UpdateEdgeSourceTargetTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/UpdateEdgeSourceTargetTest.java
index d03faa3cd184..f01677098fa8 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/UpdateEdgeSourceTargetTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/epgm/UpdateEdgeSourceTargetTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/filters/AbstractRichCombinedFilterFunctionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/filters/AbstractRichCombinedFilterFunctionTest.java
index 3d6d6295cb25..a53a037c5787 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/filters/AbstractRichCombinedFilterFunctionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/filters/AbstractRichCombinedFilterFunctionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/filters/CombinableFilterTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/filters/CombinableFilterTest.java
index 340669489a58..af8b7bcad615 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/filters/CombinableFilterTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/functions/filters/CombinableFilterTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/id/FlinkGradoopIdSetTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/id/FlinkGradoopIdSetTest.java
index 2eb5267e1b3a..b31ada705505 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/id/FlinkGradoopIdSetTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/id/FlinkGradoopIdSetTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/id/GradoopIdSerializationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/id/GradoopIdSerializationTest.java
index 9701b031c105..9f59a7b87283 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/id/GradoopIdSerializationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/id/GradoopIdSerializationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/GraphCollectionLayoutFactoryTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/GraphCollectionLayoutFactoryTest.java
index f4c3f88892b2..c2521bddc8c6 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/GraphCollectionLayoutFactoryTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/GraphCollectionLayoutFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/LogicalGraphLayoutFactoryTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/LogicalGraphLayoutFactoryTest.java
index d6ef7d194728..f298bdb1723a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/LogicalGraphLayoutFactoryTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/LogicalGraphLayoutFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVECollectionLayoutFactoryTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVECollectionLayoutFactoryTest.java
index 420e5ecb01b2..2439c4fe000b 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVECollectionLayoutFactoryTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVECollectionLayoutFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVEGraphLayoutFactoryTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVEGraphLayoutFactoryTest.java
index 4c89b78b14a8..98a0d4a9bafa 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVEGraphLayoutFactoryTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVEGraphLayoutFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVELayoutTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVELayoutTest.java
index 8231c3296efb..876ac9913db9 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVELayoutTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/GVELayoutTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVECollectionLayoutFactoryTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVECollectionLayoutFactoryTest.java
index af4b8bb4a242..6d5d890734dc 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVECollectionLayoutFactoryTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVECollectionLayoutFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVEGraphLayoutFactoryTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVEGraphLayoutFactoryTest.java
index 0ec4c75f7495..e482f73c37ba 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVEGraphLayoutFactoryTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVEGraphLayoutFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVELayoutTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVELayoutTest.java
index d0bccd221c6e..ce51d529394d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVELayoutTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/gve/indexed/IndexedGVELayoutTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutFactoryTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutFactoryTest.java
index 91f7665b9b39..a86c923c495a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutFactoryTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutTest.java
index 9795ca15c430..68b6fe51d9cd 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/layouts/transactional/TxCollectionLayoutTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/AggregationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/AggregationTest.java
index 725194c3f1cb..2864f5bf7b68 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/AggregationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/AggregationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationGVELayoutTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationGVELayoutTest.java
index 383351a83d47..70b63bd38ade 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationGVELayoutTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationGVELayoutTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationTest.java
index 1f87ac23a7e7..6371853869ce 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationTxLayoutTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationTxLayoutTest.java
index 4df651d50aa9..f6940c0acaa6 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationTxLayoutTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/ApplyAggregationTxLayoutTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SumPlusOne.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SumPlusOne.java
index d8278881005e..8504060e608c 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SumPlusOne.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/functions/SumPlusOne.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AveragePropertyTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AveragePropertyTest.java
index 9db96204f211..61da23d7ac8d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AveragePropertyTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/aggregation/functions/average/AveragePropertyTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/BinaryCollectionOperatorsTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/BinaryCollectionOperatorsTestBase.java
index 1b1ce9fe23ea..d0b03880f77a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/BinaryCollectionOperatorsTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/BinaryCollectionOperatorsTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/BinaryGraphOperatorsTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/BinaryGraphOperatorsTestBase.java
index 5883f09f2b23..ae44b876c4c9 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/BinaryGraphOperatorsTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/BinaryGraphOperatorsTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/ReducibleBinaryOperatorsTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/ReducibleBinaryOperatorsTestBase.java
index ef96d07956bb..02e1f4c46957 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/ReducibleBinaryOperatorsTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/base/ReducibleBinaryOperatorsTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/cloning/CloningTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/cloning/CloningTest.java
index 391825b9ccb3..ef769ca2c4f0 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/cloning/CloningTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/cloning/CloningTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/combination/CombinationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/combination/CombinationTest.java
index 3dd2ea4c0de4..e1b83b3e56c4 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/combination/CombinationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/combination/CombinationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/difference/DifferenceTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/difference/DifferenceTest.java
index 1c928e889072..fc7dfd7946d9 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/difference/DifferenceTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/difference/DifferenceTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIdTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIdTest.java
index 7126febe7e05..e89d063dac34 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIdTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIdTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphismTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphismTest.java
index f1e62e7c49eb..2a177d80e8d2 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphismTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphismTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphismTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphismTestBase.java
index 907cac50aed2..af003159db5e 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphismTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/DistinctByIsomorphismTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/GroupByIsomorphismTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/GroupByIsomorphismTest.java
index 042e07813ee3..60c7ff88501a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/GroupByIsomorphismTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/distinction/GroupByIsomorphismTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/equality/EqualityTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/equality/EqualityTest.java
index ef81404613a9..813553aed170 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/equality/EqualityTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/equality/EqualityTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/exclusion/ExclusionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/exclusion/ExclusionTest.java
index a6f96c45db3a..85cb0b11805e 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/exclusion/ExclusionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/exclusion/ExclusionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusionTest.java
index c33d438ab219..a218881b3bcd 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusionUtils.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusionUtils.java
index 87670ff21985..79c07b44618d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusionUtils.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/fusion/VertexFusionUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingBuilderTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingBuilderTest.java
index e84dbf0d4464..22176b3d9f6c 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingBuilderTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingBuilderTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombineTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombineTest.java
index b2eb79da1578..b1a7375fe07f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombineTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombineTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombineVertexRetentionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombineVertexRetentionTest.java
index 7c9b0e5a0dba..bed75afd9435 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombineVertexRetentionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupCombineVertexRetentionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduceTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduceTest.java
index 7a76a7dbf853..c9dc0cd06e72 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduceTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduceTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduceVertexRetentionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduceVertexRetentionTest.java
index 927180530b3e..5cc7e1c2ea5f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduceVertexRetentionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingGroupReduceVertexRetentionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingTestBase.java
index ccd92e09dc95..fb2b3b0295aa 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/GroupingTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/LabelSpecificGroupingTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/LabelSpecificGroupingTestBase.java
index 40b9989f0218..96ba19405fc2 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/LabelSpecificGroupingTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/LabelSpecificGroupingTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/LabelSpecificWithCrossGroupingTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/LabelSpecificWithCrossGroupingTestBase.java
index 668a867f2674..7d6e6fc201eb 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/LabelSpecificWithCrossGroupingTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/LabelSpecificWithCrossGroupingTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/TupleBasedGroupingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/TupleBasedGroupingTest.java
index 75aa0695093c..c324dd0d1a53 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/TupleBasedGroupingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/TupleBasedGroupingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/VertexRetentionTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/VertexRetentionTestBase.java
index b81b5baeb5a2..bd1d7c5c7242 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/VertexRetentionTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/grouping/VertexRetentionTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/intersection/ReduceIntersectionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/intersection/ReduceIntersectionTest.java
index f5b641e9fa03..9ba9507c209b 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/intersection/ReduceIntersectionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/intersection/ReduceIntersectionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/LabelSpecificAggregationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/LabelSpecificAggregationTest.java
index 73026825f4c0..5e20bda52e38 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/LabelSpecificAggregationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/keyedgrouping/functions/LabelSpecificAggregationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/LabelSpecificKeyFunctionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/LabelSpecificKeyFunctionTest.java
index 97da131997c1..61a1057498b3 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/LabelSpecificKeyFunctionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/keyedgrouping/keys/LabelSpecificKeyFunctionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/limit/LimitTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/limit/LimitTest.java
index 0508c28209fc..5e0a359c2f14 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/limit/LimitTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/limit/LimitTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/TestData.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/TestData.java
index 9d26a4b6b31c..d7d55a0a501c 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/TestData.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/TestData.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AddGraphElementToNewGraphTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AddGraphElementToNewGraphTest.java
index d982070d3ccb..9007b3af648d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AddGraphElementToNewGraphTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/functions/AddGraphElementToNewGraphTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementsFromEmbeddingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementsFromEmbeddingTest.java
index dab3f1626459..c338d3f1d703 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementsFromEmbeddingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/functions/ElementsFromEmbeddingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/DFSTraverserTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/DFSTraverserTest.java
index 6b57273fc861..4218b630bda2 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/DFSTraverserTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/DFSTraverserTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/GraphMetricsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/GraphMetricsTest.java
index 426510e89912..156c9193af51 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/GraphMetricsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/GraphMetricsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/QueryHandlerTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/QueryHandlerTest.java
index 724e093ce1f0..797fd95bb730 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/QueryHandlerTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/QueryHandlerTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/TripleTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/TripleTest.java
index aa78f7a093f1..ffe16e1cfb86 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/TripleTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/TripleTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFElementTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFElementTest.java
index 883f1cc416a6..5dfdc96e8482 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFElementTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFElementTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFTest.java
index d01e66b96292..f57e4b47c8b3 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/CNFTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/AndPredicateTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/AndPredicateTest.java
index 356919cc21e8..74eeab93a325 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/AndPredicateTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/AndPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/NotPredicateTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/NotPredicateTest.java
index da9727238f76..cbe0710888c6 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/NotPredicateTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/NotPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/OrPredicateTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/OrPredicateTest.java
index 62bb30eb68cc..5084622a4cdf 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/OrPredicateTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/OrPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/XorPredicateTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/XorPredicateTest.java
index 5e896b83f020..39841435e0af 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/XorPredicateTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/booleans/XorPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/ElementSelectorComparableTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/ElementSelectorComparableTest.java
index a81cd0463afe..752cd9045575 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/ElementSelectorComparableTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/ElementSelectorComparableTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/LiteralComparableTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/LiteralComparableTest.java
index eda87274ce2d..839ebfa657f8 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/LiteralComparableTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/LiteralComparableTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/PropertySelectorComparableTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/PropertySelectorComparableTest.java
index 7d1ac8ec5b39..60aae737981c 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/PropertySelectorComparableTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/compareables/PropertySelectorComparableTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/ComparisonExpressionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/ComparisonExpressionTest.java
index df68f186ab72..f24e4c04617c 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/ComparisonExpressionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/query/predicates/expressions/ComparisonExpressionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsLocalFSReaderTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsLocalFSReaderTest.java
index 939f670382f1..970638b6c3cb 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsLocalFSReaderTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsLocalFSReaderTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsTest.java
index 3a50ab44d2b2..170199af8cf0 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/common/statistics/GraphStatisticsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatchingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatchingTest.java
index be2815b3622a..68d3232e91bd 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatchingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatchingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatchingWithBindingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatchingWithBindingTest.java
index 97c9457c51c1..0d8036bbdb13 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatchingWithBindingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/PatternMatchingWithBindingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/SubgraphHomomorphismTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/SubgraphHomomorphismTest.java
index a14401469ba6..475971dba006 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/SubgraphHomomorphismTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/SubgraphHomomorphismTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/SubgraphIsomorphismTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/SubgraphIsomorphismTest.java
index c632c02d024b..c8e1a4651b65 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/SubgraphIsomorphismTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/SubgraphIsomorphismTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherGraphConstructionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherGraphConstructionTest.java
index eb378330c716..69c9f1324226 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherGraphConstructionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherGraphConstructionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatchingHomomorphismTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatchingHomomorphismTest.java
index f5385fd47d13..6e09b7982c66 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatchingHomomorphismTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatchingHomomorphismTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatchingIsomorphismTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatchingIsomorphismTest.java
index 464098a43ecf..b7a840918ddc 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatchingIsomorphismTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/CypherPatternMatchingIsomorphismTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/QueryEngineITTests.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/QueryEngineITTests.java
index a514d7725f3e..0e7f1fa7249f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/QueryEngineITTests.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/QueryEngineITTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/EmbeddingFactoryTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/EmbeddingFactoryTest.java
index c38479e8ff00..dae57c7b8f90 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/EmbeddingFactoryTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/EmbeddingFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/functions/ReverseEdgeEmbeddingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/functions/ReverseEdgeEmbeddingTest.java
index 87221c2f91cd..16f1655ee9f7 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/functions/ReverseEdgeEmbeddingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/functions/ReverseEdgeEmbeddingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingMetaDataTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingMetaDataTest.java
index 02889d6bc2ac..abdf08059197 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingMetaDataTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingMetaDataTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingTest.java
index b2c06f5af78e..fa9c906267ce 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingTestUtils.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingTestUtils.java
index 4ffbb429489a..f6a8045f6c4f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingTestUtils.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/common/pojos/EmbeddingTestUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/OperatorIntegrationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/OperatorIntegrationTest.java
index 8a674ea73cfa..c5ea0b62433a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/OperatorIntegrationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/OperatorIntegrationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/PhysicalOperatorTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/PhysicalOperatorTest.java
index cb65f881dd71..7fb3220c6d2f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/PhysicalOperatorTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/PhysicalOperatorTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsBulkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsBulkTest.java
index 7d39e3252a55..a5392c4c5da7 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsBulkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsBulkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsForLoopTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsForLoopTest.java
index 756fd1e5d79d..6e94428b2482 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsForLoopTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsForLoopTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsTest.java
index 440f524c4d26..042a42045a7f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/ExpandEmbeddingsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/AdoptEmptyPathsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/AdoptEmptyPathsTest.java
index dab1351c7145..b98ad8878e97 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/AdoptEmptyPathsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/AdoptEmptyPathsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/CreateInitialExpandEmbeddingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/CreateInitialExpandEmbeddingTest.java
index 97a7ecff8f17..94d31e02bd3d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/CreateInitialExpandEmbeddingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/CreateInitialExpandEmbeddingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractExpandColumnTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractExpandColumnTest.java
index 8b10d4f658c3..170a5a3a3105 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractExpandColumnTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/ExtractExpandColumnTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/MergeExpandEmbeddingsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/MergeExpandEmbeddingsTest.java
index ca27c7684f3f..67b13280ada6 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/MergeExpandEmbeddingsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/MergeExpandEmbeddingsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/PostProcessExpandEmbeddingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/PostProcessExpandEmbeddingTest.java
index 8a402a417a4f..80b07e9f59b3 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/PostProcessExpandEmbeddingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/expand/functions/PostProcessExpandEmbeddingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectEdgesTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectEdgesTest.java
index be108504d384..24baedddf307 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectEdgesTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectEdgesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectTriplesTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectTriplesTest.java
index 01c19e4dbd0d..920e78e0ef23 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectTriplesTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectTriplesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVerticesTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVerticesTest.java
index 3585595c1f61..ad9bb0796ad5 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVerticesTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterAndProjectVerticesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterEmbeddingsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterEmbeddingsTest.java
index b01f3fbdc339..6a895393bd17 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterEmbeddingsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/filter/FilterEmbeddingsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/CartesianProductTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/CartesianProductTest.java
index 07e9a41f7e7b..d6e90290c760 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/CartesianProductTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/CartesianProductTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/JoinEmbeddingsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/JoinEmbeddingsTest.java
index 13c68c371a96..f4ad0d14cf79 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/JoinEmbeddingsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/JoinEmbeddingsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/ValueJoinTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/ValueJoinTest.java
index f857ea349d92..47518820aa25 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/ValueJoinTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/ValueJoinTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractJoinColumnsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractJoinColumnsTest.java
index 38ac19bb2779..20d66f2fceda 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractJoinColumnsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractJoinColumnsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractPropertyJoinColumnsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractPropertyJoinColumnsTest.java
index 148d1d8d74e0..4b5eaf5c0924 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractPropertyJoinColumnsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/ExtractPropertyJoinColumnsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/MergeEmbeddingsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/MergeEmbeddingsTest.java
index 0faf391bc69c..46bef1407879 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/MergeEmbeddingsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/join/functions/MergeEmbeddingsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEdgesTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEdgesTest.java
index 5ae7cd79ec05..3fce3380793d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEdgesTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEdgesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddingsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddingsTest.java
index 5f518a4398ec..cc313ff6f6d0 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddingsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectEmbeddingsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectVerticesTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectVerticesTest.java
index ee95e14a0e9b..ff5d958087d6 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectVerticesTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/operators/project/ProjectVerticesTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/EstimatorTestBase.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/EstimatorTestBase.java
index e6def47cbbe5..a93a2ddc981a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/EstimatorTestBase.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/EstimatorTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/FilterEstimatorTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/FilterEstimatorTest.java
index ef45eefae010..91039c8738dd 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/FilterEstimatorTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/FilterEstimatorTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/JoinEstimatorTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/JoinEstimatorTest.java
index b84dddddc58d..68b3b4775419 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/JoinEstimatorTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/JoinEstimatorTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/QueryPlanEstimatorTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/QueryPlanEstimatorTest.java
index 0b62d9b02cdf..9a99c019b0ad 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/QueryPlanEstimatorTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/estimation/QueryPlanEstimatorTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/MockPlanNode.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/MockPlanNode.java
index 7a27ca267055..dd80c3eaf29c 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/MockPlanNode.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/MockPlanNode.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/CartesianProductNodeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/CartesianProductNodeTest.java
index f4bccb4805e1..44836f8fac7d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/CartesianProductNodeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/CartesianProductNodeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ExpandEmbeddingsNodeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ExpandEmbeddingsNodeTest.java
index d80d97a68f4f..b37506ce3b98 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ExpandEmbeddingsNodeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ExpandEmbeddingsNodeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/JoinEmbeddingsNodeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/JoinEmbeddingsNodeTest.java
index e5dd6568dc5e..f3acce8d17b5 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/JoinEmbeddingsNodeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/JoinEmbeddingsNodeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ValueJoinNodeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ValueJoinNodeTest.java
index 5193751c1ce2..5fb838408665 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ValueJoinNodeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/binary/ValueJoinNodeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectEdgesNodeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectEdgesNodeTest.java
index e32bce1fbfbf..175be046b438 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectEdgesNodeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectEdgesNodeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectVerticesNodeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectVerticesNodeTest.java
index 4da6bb4ec4ca..0413980f3a75 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectVerticesNodeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/leaf/FilterAndProjectVerticesNodeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/FilterEmbeddingsNodeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/FilterEmbeddingsNodeTest.java
index 66916247d211..84b7fff03cdb 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/FilterEmbeddingsNodeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/FilterEmbeddingsNodeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/ProjectEmbeddingsNodeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/ProjectEmbeddingsNodeTest.java
index c3b0c9451043..bc5091cae45c 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/ProjectEmbeddingsNodeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/cypher/planning/queryplan/unary/ProjectEmbeddingsNodeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismSetPairBulkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismSetPairBulkTest.java
index d08546b2a0b5..e3a7612eea89 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismSetPairBulkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismSetPairBulkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismSetPairLoopUnrollingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismSetPairLoopUnrollingTest.java
index 6907f9fa511e..10d67b902a2d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismSetPairLoopUnrollingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismSetPairLoopUnrollingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismTriplesForLoopTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismTriplesForLoopTest.java
index 54e3e0c277d9..62e2967a44f5 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismTriplesForLoopTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeHomomorphismTriplesForLoopTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismSetPairBulkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismSetPairBulkTest.java
index 72f20473914b..1f4a3e647bd7 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismSetPairBulkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismSetPairBulkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismSetPairForLoopTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismSetPairForLoopTest.java
index 531ad6ec76e0..2a08ecfae5ee 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismSetPairForLoopTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismSetPairForLoopTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismTriplesForLoopTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismTriplesForLoopTest.java
index 63ca6786e32a..58b1c6291a60 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismTriplesForLoopTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/preserving/explorative/ExplorativeIsomorphismTriplesForLoopTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationBulkTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationBulkTest.java
index 1c35c83043bb..eda53696fb51 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationBulkTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationBulkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationDeltaTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationDeltaTest.java
index 6fab679092c0..941dcc64f15b 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationDeltaTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationDeltaTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationTest.java
index 49186c41fd23..e0fd68ee1c61 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/single/simulation/dual/DualSimulationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/transactional/TransactionalPatternMatchingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/transactional/TransactionalPatternMatchingTest.java
index de27bc550ad1..45dcd7f37d93 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/transactional/TransactionalPatternMatchingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/matching/transactional/TransactionalPatternMatchingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/neighborhood/NeighborhoodTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/neighborhood/NeighborhoodTest.java
index c6e41bc583d4..47dfedc5b268 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/neighborhood/NeighborhoodTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/neighborhood/NeighborhoodTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/overlap/OverlapTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/overlap/OverlapTest.java
index efbdb06fe1d9..c4879e85602d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/overlap/OverlapTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/overlap/OverlapTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/rollup/RollUpTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/rollup/RollUpTest.java
index a5b2634ef79a..4abd35622c85 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/rollup/RollUpTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/rollup/RollUpTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/PageRankSamplingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/PageRankSamplingTest.java
index 33605831cf87..be56f56c5f58 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/PageRankSamplingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/PageRankSamplingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/ParameterizedTestForGraphSampling.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/ParameterizedTestForGraphSampling.java
index 269abae980db..448fc2e95d69 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/ParameterizedTestForGraphSampling.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/ParameterizedTestForGraphSampling.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomEdgeSamplingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomEdgeSamplingTest.java
index 8d9bb7b0ff11..d098fc060b8d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomEdgeSamplingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomEdgeSamplingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomLimitedDegreeVertexSamplingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomLimitedDegreeVertexSamplingTest.java
index 966ef482fd48..6dfd3a2c0f32 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomLimitedDegreeVertexSamplingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomLimitedDegreeVertexSamplingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomNonUniformVertexSamplingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomNonUniformVertexSamplingTest.java
index 96cfda467f01..06f84cb2565a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomNonUniformVertexSamplingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomNonUniformVertexSamplingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexEdgeSamplingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexEdgeSamplingTest.java
index ec861a512fd9..27010b3fd3ff 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexEdgeSamplingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexEdgeSamplingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexNeighborhoodSamplingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexNeighborhoodSamplingTest.java
index 330768568d20..b4de2fe47725 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexNeighborhoodSamplingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexNeighborhoodSamplingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexSamplingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexSamplingTest.java
index b1d799b26e07..8a1790757e9d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexSamplingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomVertexSamplingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomWalkSamplingTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomWalkSamplingTest.java
index 58f5ae6412ee..d7017cfb366f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomWalkSamplingTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/RandomWalkSamplingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageClusteringCoefficientTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageClusteringCoefficientTest.java
index f060874a6f62..861c4f240e03 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageClusteringCoefficientTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageClusteringCoefficientTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageDegreeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageDegreeTest.java
index fd9dc8d87afa..c24a74943a6d 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageDegreeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageDegreeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageIncomingDegreeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageIncomingDegreeTest.java
index 97faaee8fb1e..547dbf97e3a7 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageIncomingDegreeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageIncomingDegreeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageOutgoingDegreeTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageOutgoingDegreeTest.java
index 887f483d73bf..1293eac0fcdd 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageOutgoingDegreeTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/AverageOutgoingDegreeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/ConnectedComponentsDistributionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/ConnectedComponentsDistributionTest.java
index 4c19e8a71715..65b6fa06cb99 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/ConnectedComponentsDistributionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/ConnectedComponentsDistributionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/DegreeCentralityTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/DegreeCentralityTest.java
index 49f3b2eb9f93..73150d8fa4eb 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/DegreeCentralityTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/DegreeCentralityTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/GraphDensityTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/GraphDensityTest.java
index d14db331245d..637e7716d622 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/GraphDensityTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/GraphDensityTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/ValueConnectedComponentsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/ValueConnectedComponentsTest.java
index bb1fe63438e4..08406a201817 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/ValueConnectedComponentsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/sampling/statistics/ValueConnectedComponentsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/selection/SelectionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/selection/SelectionTest.java
index 8bfe86eb703b..0cdccddd93a3 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/selection/SelectionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/selection/SelectionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/split/SplitTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/split/SplitTest.java
index 6bdea7be6aeb..1e710b584046 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/split/SplitTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/split/SplitTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/statistics/StatisticsTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/statistics/StatisticsTest.java
index 20c909e6361d..a6e96ff187b7 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/statistics/StatisticsTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/statistics/StatisticsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/subgraph/SubgraphTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/subgraph/SubgraphTest.java
index d3b1057967ab..39252732eeac 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/subgraph/SubgraphTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/subgraph/SubgraphTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/tostring/CanonicalAdjacencyMatrixBuilderTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/tostring/CanonicalAdjacencyMatrixBuilderTest.java
index b377c5cc66b3..c22beee2be00 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/tostring/CanonicalAdjacencyMatrixBuilderTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/tostring/CanonicalAdjacencyMatrixBuilderTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationGVELayoutTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationGVELayoutTest.java
index 75bb9f50ecbd..4435953709b5 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationGVELayoutTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationGVELayoutTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationTest.java
index 170089c781b3..979e806385fc 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationTxLayoutTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationTxLayoutTest.java
index 46f08170a13e..45b14a018528 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationTxLayoutTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/ApplyTransformationTxLayoutTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/TransformationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/TransformationTest.java
index 1d5b706784dd..37183550f079 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/TransformationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/transformation/TransformationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/union/UnionTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/union/UnionTest.java
index a55bf8ae2189..f612e3dcf31a 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/union/UnionTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/union/UnionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/verify/VerifyTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/verify/VerifyTest.java
index 538fe04169d6..1b37940268b9 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/verify/VerifyTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/operators/verify/VerifyTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/pojo/PojoSerializationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/pojo/PojoSerializationTest.java
index ae4ee5fcb089..3caea706fce4 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/pojo/PojoSerializationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/pojo/PojoSerializationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/properties/PropertiesSerializationTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/properties/PropertiesSerializationTest.java
index f07641c53277..4a2670e8f914 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/properties/PropertiesSerializationTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/model/impl/properties/PropertiesSerializationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/representation/RepresentationConverterTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/representation/RepresentationConverterTest.java
index a28c56a2a7dd..643e2494c70e 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/representation/RepresentationConverterTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/representation/RepresentationConverterTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-flink/src/test/java/org/gradoop/flink/util/FlinkAsciiGraphLoaderTest.java b/gradoop-flink/src/test/java/org/gradoop/flink/util/FlinkAsciiGraphLoaderTest.java
index fe4464e8069d..31f74f028b7f 100644
--- a/gradoop-flink/src/test/java/org/gradoop/flink/util/FlinkAsciiGraphLoaderTest.java
+++ b/gradoop-flink/src/test/java/org/gradoop/flink/util/FlinkAsciiGraphLoaderTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-quickstart/src/main/resources/archetype-resources/src/main/java/GradoopApplication.java b/gradoop-quickstart/src/main/resources/archetype-resources/src/main/java/GradoopApplication.java
index cd966c4c8909..ee995b431ed0 100644
--- a/gradoop-quickstart/src/main/resources/archetype-resources/src/main/java/GradoopApplication.java
+++ b/gradoop-quickstart/src/main/resources/archetype-resources/src/main/java/GradoopApplication.java
@@ -2,7 +2,7 @@
 #set( $symbol_dollar = '$' )
 #set( $symbol_escape = '\' )
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/config/GradoopAccumuloConfig.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/config/GradoopAccumuloConfig.java
index c1f1de54121c..fa33923b1cd3 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/config/GradoopAccumuloConfig.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/config/GradoopAccumuloConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/config/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/config/package-info.java
index 08a2db75280d..c696404a8d3e 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/config/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/config/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/AccumuloEPGMStore.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/AccumuloEPGMStore.java
index 08974e29c65c..aa2b237500f9 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/AccumuloEPGMStore.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/AccumuloEPGMStore.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/AccumuloDefault.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/AccumuloDefault.java
index 0cd71ae5ff6e..b77803d98cfb 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/AccumuloDefault.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/AccumuloDefault.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/AccumuloTables.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/AccumuloTables.java
index fcc369b0d0d5..352e75ae8ec1 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/AccumuloTables.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/AccumuloTables.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/package-info.java
index 297c2341bb36..dc6242882f0e 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/constants/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloEdgeHandler.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloEdgeHandler.java
index 8f265a2fa185..f59060e0440d 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloEdgeHandler.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloEdgeHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloGraphHandler.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloGraphHandler.java
index 9436bfc6e97a..cc4f6db8a8e6 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloGraphHandler.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloGraphHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloRowHandler.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloRowHandler.java
index afe48a416562..5dd82ea26715 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloRowHandler.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloRowHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloVertexHandler.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloVertexHandler.java
index a62e2d831d88..df03bcdb5360 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloVertexHandler.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/AccumuloVertexHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/package-info.java
index 2757315d78b9..0ed94643367a 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/handler/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloBase.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloBase.java
index 8b6e7324f982..69e2f623d65c 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloBase.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloDataSink.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloDataSink.java
index 2c2954fd8922..586ecfa9e5bb 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloDataSink.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloDataSource.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloDataSource.java
index c41065035fad..a9fc2606006e 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloDataSource.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/AccumuloDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/BaseInputFormat.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/BaseInputFormat.java
index 01e86643989d..8fb14774e987 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/BaseInputFormat.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/BaseInputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/EdgeInputFormat.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/EdgeInputFormat.java
index ed9b0bbe3240..4e2d73d48f0a 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/EdgeInputFormat.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/EdgeInputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/GraphHeadInputFormat.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/GraphHeadInputFormat.java
index 2510b9c6ccce..32d3d7cc3808 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/GraphHeadInputFormat.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/GraphHeadInputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/VertexInputFormat.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/VertexInputFormat.java
index 6481de062db2..3e98dda3208e 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/VertexInputFormat.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/VertexInputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/package-info.java
index 3e96d56c2779..dd74dc959ef0 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/inputformats/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/outputformats/ElementOutputFormat.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/outputformats/ElementOutputFormat.java
index 31217659e2bc..95ccfb46727e 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/outputformats/ElementOutputFormat.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/outputformats/ElementOutputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/outputformats/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/outputformats/package-info.java
index c37fe95a9ae7..899f5a19c007 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/outputformats/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/outputformats/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/package-info.java
index e803db032111..5fc1f3d51e8b 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/io/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/client/ClientClosableIterator.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/client/ClientClosableIterator.java
index 65fd3a9503ab..30d4ffa04335 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/client/ClientClosableIterator.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/client/ClientClosableIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/client/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/client/package-info.java
index 03fcc74c86f6..3f56ea8730ac 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/client/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/client/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/BaseElementIterator.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/BaseElementIterator.java
index fd20efd009cd..cd927c19466e 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/BaseElementIterator.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/BaseElementIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopEdgeIterator.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopEdgeIterator.java
index 4f9ec1e216ed..23e7667d06a9 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopEdgeIterator.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopEdgeIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopGraphHeadIterator.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopGraphHeadIterator.java
index f8ea6b128da1..c3fc8fca360b 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopGraphHeadIterator.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopGraphHeadIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopVertexIterator.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopVertexIterator.java
index a548a3c9f065..f162ac1973c9 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopVertexIterator.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/GradoopVertexIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/package-info.java
index 742788db4961..85fee621491c 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/iterator/tserver/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/package-info.java
index 091be41cea7c..4052f463b938 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/api/AccumuloElementFilter.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/api/AccumuloElementFilter.java
index 137ea10af080..7e0b356434a3 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/api/AccumuloElementFilter.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/api/AccumuloElementFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/api/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/api/package-info.java
index bcaf02614b40..4bff9646e216 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/api/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/And.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/And.java
index 44c4cc96c5a5..d6d135ae6ae3 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/And.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/And.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/Not.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/Not.java
index ccda6e64b48d..1c2bf18e7587 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/Not.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/Not.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/Or.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/Or.java
index 7386ee4e2c4f..556f0e3cf62b 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/Or.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/Or.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/package-info.java
index f5b81b7a137a..9fa4ba51fff0 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/calculate/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloLabelIn.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloLabelIn.java
index 20b2e9ec7876..9667fe1c7bc3 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloLabelIn.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloLabelIn.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloLabelReg.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloLabelReg.java
index 5ed251892057..119f15ed5950 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloLabelReg.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloLabelReg.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropEquals.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropEquals.java
index 8c3f2f6613e4..6eb532d89422 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropEquals.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropEquals.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropLargerThan.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropLargerThan.java
index cc3b9a8dbbb6..89ea2ee29caf 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropLargerThan.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropLargerThan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropReg.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropReg.java
index e588d711f5c5..dbf95d903d0a 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropReg.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/AccumuloPropReg.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/package-info.java
index ffa2e6b30840..a59b2445ca72 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/filter/impl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/query/AccumuloQueryHolder.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/query/AccumuloQueryHolder.java
index bb1f902808d3..55b118036f75 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/query/AccumuloQueryHolder.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/query/AccumuloQueryHolder.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/query/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/query/package-info.java
index e4c0564dcf68..de2eb3184f33 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/query/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/impl/predicate/query/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/AccumuloFilters.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/AccumuloFilters.java
index 7d7983387ae2..30b4abefc228 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/AccumuloFilters.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/AccumuloFilters.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/KryoUtils.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/KryoUtils.java
index b71b300c5ebc..03623d91ccff 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/KryoUtils.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/KryoUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/package-info.java b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/package-info.java
index 88c0825d96a1..09d7e3a11b76 100644
--- a/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/package-info.java
+++ b/gradoop-store/gradoop-accumulo/src/main/java/org/gradoop/storage/accumulo/utils/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/AccumuloStoreTestBase.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/AccumuloStoreTestBase.java
index 19fb00406f3c..f853253f6c2f 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/AccumuloStoreTestBase.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/AccumuloStoreTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/AccumuloTestSuite.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/AccumuloTestSuite.java
index 22c0c4e64768..80b15b90c36f 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/AccumuloTestSuite.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/AccumuloTestSuite.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/basic/StoreTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/basic/StoreTest.java
index 0943c3a0d5ed..fdae7c98c764 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/basic/StoreTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/basic/StoreTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/IOBasicTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/IOBasicTest.java
index 5817c2d6705e..4828d6cbe780 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/IOBasicTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/IOBasicTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOEdgePredicateTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOEdgePredicateTest.java
index b02bd3aa29fc..5f4e7f9b68f7 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOEdgePredicateTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOEdgePredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOElementIdRangeTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOElementIdRangeTest.java
index 91f280fe778b..8ea8ce5d981b 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOElementIdRangeTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOElementIdRangeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOGraphPredicateTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOGraphPredicateTest.java
index 3641940c30d4..b3b008f62b22 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOGraphPredicateTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOGraphPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOVertexPredicateTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOVertexPredicateTest.java
index 735f02e1fd62..7d794b9061fb 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOVertexPredicateTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/io/source/IOVertexPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreBasicPredicateTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreBasicPredicateTest.java
index 5107f57f7d5a..4b58edce2c74 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreBasicPredicateTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreBasicPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreIdsPredicateTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreIdsPredicateTest.java
index be29fedc5b3b..2240e8a294f9 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreIdsPredicateTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreIdsPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreLabelPredicateTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreLabelPredicateTest.java
index 2e7944b0f3fb..70e8107b7be4 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreLabelPredicateTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StoreLabelPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StorePropPredicateTest.java b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StorePropPredicateTest.java
index d93dc694dbaf..7f499b53d2c4 100644
--- a/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StorePropPredicateTest.java
+++ b/gradoop-store/gradoop-accumulo/src/test/java/org/gradoop/storage/impl/accumulo/predicate/StorePropPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/config/GradoopHBaseConfig.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/config/GradoopHBaseConfig.java
index 9194907b1878..a504e6e73752 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/config/GradoopHBaseConfig.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/config/GradoopHBaseConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/config/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/config/package-info.java
index 0b86c49af054..3d8323cbe93f 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/config/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/config/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/HBaseEPGMStore.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/HBaseEPGMStore.java
index a4a01f78f2ef..dc405b7fa73f 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/HBaseEPGMStore.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/HBaseEPGMStore.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/EdgeHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/EdgeHandler.java
index 892db1837332..55acbc5c1c3e 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/EdgeHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/EdgeHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/ElementHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/ElementHandler.java
index c3004cbd7f1e..59106564bc3f 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/ElementHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/ElementHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/GraphElementHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/GraphElementHandler.java
index 2e69d1b6e029..641c14e3a2f3 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/GraphElementHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/GraphElementHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/GraphHeadHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/GraphHeadHandler.java
index b4ae1dbded93..cedf196be6b7 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/GraphHeadHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/GraphHeadHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/VertexHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/VertexHandler.java
index 71a175a22a6a..9dbdb25647ca 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/VertexHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/VertexHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/package-info.java
index d21a71a2e4c6..d60ca5e6e1b3 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/constants/HBaseConstants.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/constants/HBaseConstants.java
index f109ea455c32..372ba76fc94b 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/constants/HBaseConstants.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/constants/HBaseConstants.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/constants/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/constants/package-info.java
index 6c257ff1f70b..7561147e6e67 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/constants/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/constants/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/factory/HBaseEPGMStoreFactory.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/factory/HBaseEPGMStoreFactory.java
index ea3ea0ef975a..b4aa8943643b 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/factory/HBaseEPGMStoreFactory.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/factory/HBaseEPGMStoreFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/factory/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/factory/package-info.java
index 91f6d78e9d63..ca73ff94c170 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/factory/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/factory/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseEdgeHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseEdgeHandler.java
index 1429ad70c37d..abe163a169b0 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseEdgeHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseEdgeHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseElementHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseElementHandler.java
index 3f9974f8f321..a2b0da4eb13a 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseElementHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseElementHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseGraphElementHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseGraphElementHandler.java
index e1c75ab85def..7500e4182e19 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseGraphElementHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseGraphElementHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseGraphHeadHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseGraphHeadHandler.java
index 5649e0e4b134..203f25a38ada 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseGraphHeadHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseGraphHeadHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseVertexHandler.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseVertexHandler.java
index 716be7d70b23..ae21b0dee760 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseVertexHandler.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/HBaseVertexHandler.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/package-info.java
index 4026d18028df..03e5b1d5d4dc 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/handler/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseBase.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseBase.java
index 571cc56b4dcc..a2553876028d 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseBase.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseDataSink.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseDataSink.java
index aed08886d299..2499f8c1f7da 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseDataSink.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseDataSource.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseDataSource.java
index 3ca13f4baa75..f971de375a11 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseDataSource.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/HBaseDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildEdgeMutation.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildEdgeMutation.java
index 377a7d7de24f..e8c0084cecf1 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildEdgeMutation.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildEdgeMutation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildGraphHeadMutation.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildGraphHeadMutation.java
index dc1cac6cab3c..de68f843f2be 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildGraphHeadMutation.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildGraphHeadMutation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildVertexMutation.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildVertexMutation.java
index 15442712a8fd..90845092230d 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildVertexMutation.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/BuildVertexMutation.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/package-info.java
index 1a1834ccbd98..e0d6d68cf822 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/BaseTableInputFormat.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/BaseTableInputFormat.java
index 403c9983e608..91520f2b07e0 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/BaseTableInputFormat.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/BaseTableInputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/EdgeTableInputFormat.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/EdgeTableInputFormat.java
index ce75427002b6..4dfb104f32f9 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/EdgeTableInputFormat.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/EdgeTableInputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/GraphHeadTableInputFormat.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/GraphHeadTableInputFormat.java
index d2754a69cf02..a375790f0de4 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/GraphHeadTableInputFormat.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/GraphHeadTableInputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/VertexTableInputFormat.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/VertexTableInputFormat.java
index 33625bec2715..852d2cfb406e 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/VertexTableInputFormat.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/VertexTableInputFormat.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/package-info.java
index 3af45e6af4ea..5d8e31dcf4dd 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/inputformats/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/package-info.java
index c213a060346e..1dfd3a27f497 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/io/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseEdgeIterator.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseEdgeIterator.java
index d427f1ec9322..84eeb12e09d1 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseEdgeIterator.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseEdgeIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseGraphIterator.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseGraphIterator.java
index caeaff2a3a62..2b4d812e144f 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseGraphIterator.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseGraphIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseVertexIterator.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseVertexIterator.java
index 76b979565840..e359cb0f1622 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseVertexIterator.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/HBaseVertexIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/package-info.java
index e63f5a5b548b..1126a728bc3c 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/iterator/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/package-info.java
index 709903171bff..29389e550cd4 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/HBaseFilterUtils.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/HBaseFilterUtils.java
index c46b2b5e76fa..032d40ca1bf4 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/HBaseFilterUtils.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/HBaseFilterUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/api/HBaseElementFilter.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/api/HBaseElementFilter.java
index 2342b19f6bd7..bcee0063c55c 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/api/HBaseElementFilter.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/api/HBaseElementFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/api/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/api/package-info.java
index 1fb7167abbd7..487163d73bcf 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/api/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/And.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/And.java
index 9b6609c49724..48c564a484c2 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/And.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/And.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/Not.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/Not.java
index c07c2d9a8f97..453f4613bab1 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/Not.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/Not.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/Or.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/Or.java
index cd127e58174f..0c057fd83b63 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/Or.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/Or.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/package-info.java
index c997ce7f478c..c7052aa13deb 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/calculate/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBaseLabelIn.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBaseLabelIn.java
index 5872caefdcff..70645fd21822 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBaseLabelIn.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBaseLabelIn.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBaseLabelReg.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBaseLabelReg.java
index 62b12fc7e31c..6d2fd0905619 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBaseLabelReg.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBaseLabelReg.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropEquals.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropEquals.java
index 1b0442ed2908..4b11bcc84c56 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropEquals.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropEquals.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropLargerThan.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropLargerThan.java
index 1abfd951a9fe..da1d073f2927 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropLargerThan.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropLargerThan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropReg.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropReg.java
index f926110ca6b7..8d72597a79bd 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropReg.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/HBasePropReg.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/package-info.java
index 6f213074a523..156002f2e741 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/impl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/package-info.java
index f39b59405362..af8085a0594b 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/impl/predicate/filter/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/HBaseFilters.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/HBaseFilters.java
index cc5ef2cc4467..60f4384b2ddb 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/HBaseFilters.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/HBaseFilters.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/RegionSplitter.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/RegionSplitter.java
index 4dddd7929428..c0cc1a0ac900 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/RegionSplitter.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/RegionSplitter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/RowKeyDistributor.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/RowKeyDistributor.java
index 1abbc1756033..b560fd2273fc 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/RowKeyDistributor.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/RowKeyDistributor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/package-info.java b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/package-info.java
index 490b703de1cd..afbbbf933d57 100644
--- a/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/package-info.java
+++ b/gradoop-store/gradoop-hbase/src/main/java/org/gradoop/storage/hbase/utils/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/GradoopHBaseTestBase.java b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/GradoopHBaseTestBase.java
index 0fc555e6c074..9f879b1edefa 100644
--- a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/GradoopHBaseTestBase.java
+++ b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/GradoopHBaseTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/HBaseEPGMStoreTest.java b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/HBaseEPGMStoreTest.java
index 3c89ab35afe3..7929e80d543a 100644
--- a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/HBaseEPGMStoreTest.java
+++ b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/HBaseEPGMStoreTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/HBaseGraphStoreTest.java b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/HBaseGraphStoreTest.java
index 09b47faa5e07..59c184052ecc 100644
--- a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/HBaseGraphStoreTest.java
+++ b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/HBaseGraphStoreTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/io/HBaseDataSinkSourceTest.java b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/io/HBaseDataSinkSourceTest.java
index 8214543542bf..31ecd4321718 100644
--- a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/io/HBaseDataSinkSourceTest.java
+++ b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/io/HBaseDataSinkSourceTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBaseLabelInTest.java b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBaseLabelInTest.java
index afde712a2458..afb78286474d 100644
--- a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBaseLabelInTest.java
+++ b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBaseLabelInTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBaseLabelRegTest.java b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBaseLabelRegTest.java
index e39238d5a61c..7a28d39f84d4 100644
--- a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBaseLabelRegTest.java
+++ b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBaseLabelRegTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropEqualsTest.java b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropEqualsTest.java
index 934c27382214..40da15216435 100644
--- a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropEqualsTest.java
+++ b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropEqualsTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropLargerThanTest.java b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropLargerThanTest.java
index 2ff12843af6d..ecd99b6c0171 100644
--- a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropLargerThanTest.java
+++ b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropLargerThanTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropRegTest.java b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropRegTest.java
index bb3ab615fa64..ec746709dce5 100644
--- a/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropRegTest.java
+++ b/gradoop-store/gradoop-hbase/src/test/java/org/gradoop/storage/impl/hbase/predicate/filter/impl/HBasePropRegTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMConfigProvider.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMConfigProvider.java
index 46c282aa6705..41151cafda26 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMConfigProvider.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMConfigProvider.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphInput.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphInput.java
index 4190a6a47019..6b2ad75e2809 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphInput.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphInput.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphOutput.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphOutput.java
index 2178302e0969..35fcdd85969f 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphOutput.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphOutput.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphPredictableOutput.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphPredictableOutput.java
index 2596b45c4715..8cfcacc124e4 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphPredictableOutput.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/EPGMGraphPredictableOutput.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/package-info.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/package-info.java
index fbb62b51a8d9..fa6d55329a9b 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/package-info.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/config/GradoopStoreConfig.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/config/GradoopStoreConfig.java
index 43af5a0cca2a..04172bfe5f26 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/config/GradoopStoreConfig.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/config/GradoopStoreConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/config/package-info.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/config/package-info.java
index 8707dd9df903..bfde28ed2ca4 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/config/package-info.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/config/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/io/FilterableDataSource.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/io/FilterableDataSource.java
index 275d42297205..4b37b2747950 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/io/FilterableDataSource.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/io/FilterableDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/io/package-info.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/io/package-info.java
index 1da7919c30ec..baaff3551766 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/io/package-info.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/io/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/ClosableIterator.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/ClosableIterator.java
index dd4dd5b0773b..e3c5da11f56e 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/ClosableIterator.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/ClosableIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/EmptyClosableIterator.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/EmptyClosableIterator.java
index 47d6b83abf19..cf6b400ec729 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/EmptyClosableIterator.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/EmptyClosableIterator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/package-info.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/package-info.java
index 7f3af8e1ca9e..af3afa2798ff 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/package-info.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/iterator/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/api/ElementFilter.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/api/ElementFilter.java
index 69fe5931ff95..8c510e69a762 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/api/ElementFilter.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/api/ElementFilter.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/api/package-info.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/api/package-info.java
index 3338900bd5b1..2da990d16a69 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/api/package-info.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/LabelIn.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/LabelIn.java
index fd131dfee802..5c8b89cbd15d 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/LabelIn.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/LabelIn.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/LabelReg.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/LabelReg.java
index 3d511bc79488..dbe32e03f4ce 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/LabelReg.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/LabelReg.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropEquals.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropEquals.java
index 79f4b1ee482d..5d34a9d1186e 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropEquals.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropEquals.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropLargerThan.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropLargerThan.java
index 88136bfe8f87..8b09e904a27e 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropLargerThan.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropLargerThan.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropReg.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropReg.java
index 435a8a103930..4dee9cdfd0c3 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropReg.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/PropReg.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/package-info.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/package-info.java
index e7b80f059b64..9c00a8cc8188 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/package-info.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/filter/impl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/ElementQuery.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/ElementQuery.java
index b7befb734e8c..160d0405803b 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/ElementQuery.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/ElementQuery.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/Query.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/Query.java
index 9899f34e186d..f137d9a755ef 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/Query.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/Query.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/package-info.java b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/package-info.java
index a3790ec1b51f..51214a381d52 100644
--- a/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/package-info.java
+++ b/gradoop-store/gradoop-store-api/src/main/java/org/gradoop/storage/common/predicate/query/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/TemporalDataSink.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/TemporalDataSink.java
index 35c87c8f0b13..aa3fe64f7d18 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/TemporalDataSink.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/TemporalDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/TemporalDataSource.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/TemporalDataSource.java
index 512dad6f321a..28db7c4807d3 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/TemporalDataSource.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/TemporalDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/package-info.java
index bab106eae56d..da245a91bed4 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/TemporalCSVDataSink.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/TemporalCSVDataSink.java
index f5d9bd615d28..62c43dc7ffae 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/TemporalCSVDataSink.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/TemporalCSVDataSink.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/TemporalCSVDataSource.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/TemporalCSVDataSource.java
index 201eafacdd3d..fda76105a560 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/TemporalCSVDataSource.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/TemporalCSVDataSource.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalEdge.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalEdge.java
index e4867b852c4d..895ba372ca0d 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalEdge.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalElement.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalElement.java
index eee927bc8057..dc227dc0a014 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalElement.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalGraphHead.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalGraphHead.java
index d690588be781..c8bab2bd2576 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalGraphHead.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalVertex.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalVertex.java
index d02467d46458..345ed85ca40a 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalVertex.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/CSVLineToTemporalVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalEdgeToTemporalCSVEdge.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalEdgeToTemporalCSVEdge.java
index 76a1233b6b1b..ad964602efe7 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalEdgeToTemporalCSVEdge.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalEdgeToTemporalCSVEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalElementToCSV.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalElementToCSV.java
index 60d5c5c314f4..1641addb47a0 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalElementToCSV.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalElementToCSV.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalGraphHeadToTemporalCSVGraphHead.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalGraphHeadToTemporalCSVGraphHead.java
index ed66e6ffa95d..d6940005731c 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalGraphHeadToTemporalCSVGraphHead.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalGraphHeadToTemporalCSVGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalVertexToTemporalCSVVertex.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalVertexToTemporalCSVVertex.java
index 6e4588a45aba..fe90a2be8c9e 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalVertexToTemporalCSVVertex.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/TemporalVertexToTemporalCSVVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/package-info.java
index c3be289e81a5..91f74d7b49bf 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/package-info.java
index fc101989c8f1..4c36ff150798 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVEdge.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVEdge.java
index 5f1c9a460f1e..2b15d8b91b2e 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVEdge.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVElement.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVElement.java
index 959a18ac1d28..f42a259ccbd7 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVElement.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVGraphHead.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVGraphHead.java
index 7f464c0f9db7..1ad23e1d34f0 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVGraphHead.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVVertex.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVVertex.java
index cc84ea3e4c69..158924f24cb8 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVVertex.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/TemporalCSVVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/package-info.java
index 265a09b5661d..1c468a234cf6 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/io/impl/csv/tuples/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TemporalGraphCollectionOperators.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TemporalGraphCollectionOperators.java
index 79f7d602f0be..57c954e4db69 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TemporalGraphCollectionOperators.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TemporalGraphCollectionOperators.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TemporalGraphOperators.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TemporalGraphOperators.java
index 378973c3e629..1fbd2616b6b5 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TemporalGraphOperators.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TemporalGraphOperators.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TimeDimension.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TimeDimension.java
index 1226b12b7c42..5f1d677f7c5a 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TimeDimension.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/TimeDimension.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TemporalAggregateFunction.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TemporalAggregateFunction.java
index 7cdc1b671c03..5305651d6da7 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TemporalAggregateFunction.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TemporalAggregateFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TemporalPredicate.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TemporalPredicate.java
index 8eacaa50192b..30f54a5da1a8 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TemporalPredicate.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TemporalPredicate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TimeIntervalExtractor.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TimeIntervalExtractor.java
index 5eda7e29b980..4511ad5f4f03 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TimeIntervalExtractor.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/TimeIntervalExtractor.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/package-info.java
index 136bab102de1..da978a8e8dc5 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/package-info.java
index bb2a87845d7c..67ccb50be136 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/api/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraph.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraph.java
index 90d7b6f18e60..89713948b564 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraph.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraph.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphCollection.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphCollection.java
index 197e0f9961e1..4bb66528abbb 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphCollection.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphCollection.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionFactory.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionFactory.java
index be388cbda6c8..be5ef1655f3a 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionFactory.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphFactory.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphFactory.java
index 1861b708a4a9..6684554bfa73 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphFactory.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/TemporalGraphFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/package-info.java
index 36e6f717a079..f43798806945 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/All.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/All.java
index b6dc590f7ea3..d23bbdd17d66 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/All.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/All.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/AsOf.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/AsOf.java
index 769ac10407e2..8c6cc0809a38 100755
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/AsOf.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/AsOf.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Between.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Between.java
index 8b71cb4224dc..35c565ed9be4 100755
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Between.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Between.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/ContainedIn.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/ContainedIn.java
index 74bef01b6898..2809b03f0ce5 100755
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/ContainedIn.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/ContainedIn.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/CreatedIn.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/CreatedIn.java
index bbfce8de355e..ecb4a49bab83 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/CreatedIn.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/CreatedIn.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/DeletedIn.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/DeletedIn.java
index 8ceec678464e..320e1837f634 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/DeletedIn.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/DeletedIn.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/FromTo.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/FromTo.java
index d10d7c6721cb..03ee39e7ffa1 100755
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/FromTo.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/FromTo.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Overlaps.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Overlaps.java
index db0f5a056a5d..654fe7136d02 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Overlaps.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Overlaps.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Precedes.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Precedes.java
index b17106bcbebf..eac42079514e 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Precedes.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Precedes.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Succeeds.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Succeeds.java
index b5b2ed70a5d2..aaad23ca9b80 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Succeeds.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/Succeeds.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/ValidDuring.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/ValidDuring.java
index f14134ecec10..dafdb538f8fe 100755
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/ValidDuring.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/ValidDuring.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/package-info.java
index 2f0138a06b72..367726f5ac0b 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/predicates/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/EdgeToTemporalEdge.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/EdgeToTemporalEdge.java
index c32ded87ed82..082b66789db6 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/EdgeToTemporalEdge.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/EdgeToTemporalEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/GraphHeadToTemporalGraphHead.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/GraphHeadToTemporalGraphHead.java
index 2b106fdd6410..dba0c34eec99 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/GraphHeadToTemporalGraphHead.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/GraphHeadToTemporalGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalEdgeToEdge.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalEdgeToEdge.java
index 91874f0f8bb7..1f0e3cd07cb7 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalEdgeToEdge.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalEdgeToEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalGraphHeadToGraphHead.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalGraphHeadToGraphHead.java
index 2ae1992b5f14..39391a5929ba 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalGraphHeadToGraphHead.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalGraphHeadToGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalVertexToVertex.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalVertexToVertex.java
index 2c47af892d09..7cefd132765d 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalVertexToVertex.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/TemporalVertexToVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/VertexToTemporalVertex.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/VertexToTemporalVertex.java
index 8a6c34654c2b..6f8feae2f4da 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/VertexToTemporalVertex.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/VertexToTemporalVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/package-info.java
index d0972c43216f..7d3412ab2585 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/functions/tpgm/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalBaseLayoutFactory.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalBaseLayoutFactory.java
index a4344a012a82..37f95ce41cf4 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalBaseLayoutFactory.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalBaseLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGVELayout.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGVELayout.java
index f2afb46c750b..ac5fdda1c84d 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGVELayout.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGVELayout.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGraphCollectionLayoutFactory.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGraphCollectionLayoutFactory.java
index e4c21a4a1536..a7dab4671e8a 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGraphCollectionLayoutFactory.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGraphCollectionLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGraphLayoutFactory.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGraphLayoutFactory.java
index 5e2fb28261df..8ba6e2371cd9 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGraphLayoutFactory.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/TemporalGraphLayoutFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/package-info.java
index d733b846c0d1..d8220db14a71 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/layout/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractDurationAggregateFunction.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractDurationAggregateFunction.java
index 7cddd8358d24..d670bef4ea13 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractDurationAggregateFunction.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractDurationAggregateFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractTimeAggregateFunction.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractTimeAggregateFunction.java
index 72203b074fc7..160efa42b25f 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractTimeAggregateFunction.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractTimeAggregateFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageDuration.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageDuration.java
index 252017685d47..45b12c98e9ce 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageDuration.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageDuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageEdgeDuration.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageEdgeDuration.java
index ecb5dabe07ea..2f188abacd14 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageEdgeDuration.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageEdgeDuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageVertexDuration.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageVertexDuration.java
index f998d61a6990..263bb4abce5c 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageVertexDuration.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageVertexDuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxDuration.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxDuration.java
index 5cd66c293e50..ce3cf3bd33e6 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxDuration.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxDuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxEdgeDuration.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxEdgeDuration.java
index ea164744141c..a54ac96ee239 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxEdgeDuration.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxEdgeDuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxEdgeTime.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxEdgeTime.java
index f63294538a25..bcc7964b2112 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxEdgeTime.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxEdgeTime.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxTime.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxTime.java
index 251aa1dbbfe9..f5ce004338b6 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxTime.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxTime.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxVertexDuration.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxVertexDuration.java
index ef132a5f3329..b1be5149a037 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxVertexDuration.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxVertexDuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxVertexTime.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxVertexTime.java
index dd985530893b..94f10b5a340b 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxVertexTime.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MaxVertexTime.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinDuration.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinDuration.java
index c5278ca68972..34fae24d1a53 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinDuration.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinDuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinEdgeDuration.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinEdgeDuration.java
index a5b055644da0..af469083df07 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinEdgeDuration.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinEdgeDuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinEdgeTime.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinEdgeTime.java
index c61f6c6cddf8..532941e43c27 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinEdgeTime.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinEdgeTime.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinTime.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinTime.java
index a7e107e4832d..81c5b72f87e2 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinTime.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinTime.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinVertexDuration.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinVertexDuration.java
index 479117cc8654..b5e9e5b88aa1 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinVertexDuration.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinVertexDuration.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinVertexTime.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinVertexTime.java
index 1e1015e32577..848532081b25 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinVertexTime.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinVertexTime.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/package-info.java
index 89bce9a5bcd0..429c1717a87c 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/Diff.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/Diff.java
index 68db7e3869e5..86b37df62012 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/Diff.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/Diff.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/functions/DiffPerElement.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/functions/DiffPerElement.java
index bb2da0cbe43a..c910ace59c6f 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/functions/DiffPerElement.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/functions/DiffPerElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/functions/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/functions/package-info.java
index 996eb0c85f41..7991b8081945 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/functions/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/package-info.java
index dfef64b1f896..288145f1cf5b 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/diff/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/TemporalGroupingKeys.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/TemporalGroupingKeys.java
index 1e7808f3fb00..2cdc9d98b163 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/TemporalGroupingKeys.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/TemporalGroupingKeys.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/DurationKeyFunction.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/DurationKeyFunction.java
index 568dcef83d85..37146625154e 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/DurationKeyFunction.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/DurationKeyFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeIntervalKeyFunction.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeIntervalKeyFunction.java
index 27dadec445b6..c7355eba6ff0 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeIntervalKeyFunction.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeIntervalKeyFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeStampKeyFunction.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeStampKeyFunction.java
index 77a37e33323c..89bdbef2ca07 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeStampKeyFunction.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeStampKeyFunction.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/package-info.java
index a3409127c4ee..7e8ec31a16a8 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/package-info.java
index d1ee6f9367ef..f251395cb209 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/package-info.java
index f4a5cdc15129..cd956a104017 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/Snapshot.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/Snapshot.java
index 130027cc100b..2d255a8cf449 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/Snapshot.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/Snapshot.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/functions/ByTemporalPredicate.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/functions/ByTemporalPredicate.java
index 504a7857aae2..27f7ebb174e8 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/functions/ByTemporalPredicate.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/functions/ByTemporalPredicate.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/functions/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/functions/package-info.java
index 17fd012e8c54..2d423cc82eb6 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/functions/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/package-info.java
index be3571fe313f..ce382eb379c9 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/snapshot/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalEdgeToDataString.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalEdgeToDataString.java
index da6ab7702e42..7845a9a4a180 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalEdgeToDataString.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalEdgeToDataString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalGraphHeadToDataString.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalGraphHeadToDataString.java
index 682c463810aa..29af2515dbeb 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalGraphHeadToDataString.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalGraphHeadToDataString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalVertexToDataString.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalVertexToDataString.java
index 900927db5511..6c9831ce5f5b 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalVertexToDataString.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalVertexToDataString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/functions/TemporalElementToDataString.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/functions/TemporalElementToDataString.java
index 23a04c066573..f70c4aefb707 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/functions/TemporalElementToDataString.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/functions/TemporalElementToDataString.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/functions/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/functions/package-info.java
index f912b616000a..c22d8694d02a 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/functions/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/functions/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/package-info.java
index 9c483e383cc5..0d3aaf890582 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/operators/tostring/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/package-info.java
index e7f6d759185b..ef0a1e581501 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalEdge.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalEdge.java
index 6c08da1cfb7a..3e550547c464 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalEdge.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalEdge.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalEdgeFactory.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalEdgeFactory.java
index bc5f6f6ae019..23a6c37e9342 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalEdgeFactory.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalEdgeFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalElement.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalElement.java
index bbe24dd6ca74..362452c00afe 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalElement.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphElement.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphElement.java
index 2f706727e0e0..8e4673cea740 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphElement.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphElement.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHead.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHead.java
index f248fe93bd5a..7346406319c4 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHead.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHead.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHeadFactory.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHeadFactory.java
index 86b432def88d..4bb696defcf4 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHeadFactory.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHeadFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalVertex.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalVertex.java
index 8e0a0a6de6ec..5bf7e2308be4 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalVertex.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalVertex.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalVertexFactory.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalVertexFactory.java
index d8f43f85a25a..b655577696d7 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalVertexFactory.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/TemporalVertexFactory.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/package-info.java
index ccd54cd7780f..b67eafc92bb3 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/model/impl/pojo/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/util/TemporalGradoopConfig.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/util/TemporalGradoopConfig.java
index 372f3603b405..eebae44dcb65 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/util/TemporalGradoopConfig.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/util/TemporalGradoopConfig.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/util/TimeFormatConversion.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/util/TimeFormatConversion.java
index 27891f8136a8..19c6cccde6d8 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/util/TimeFormatConversion.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/util/TimeFormatConversion.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/main/java/org/gradoop/temporal/util/package-info.java b/gradoop-temporal/src/main/java/org/gradoop/temporal/util/package-info.java
index f6588ecaf5be..1f17756828be 100644
--- a/gradoop-temporal/src/main/java/org/gradoop/temporal/util/package-info.java
+++ b/gradoop-temporal/src/main/java/org/gradoop/temporal/util/package-info.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/io/impl/csv/TemporalCSVSourceAndSinkTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/io/impl/csv/TemporalCSVSourceAndSinkTest.java
index 49ba11350c05..07396b49ebfc 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/io/impl/csv/TemporalCSVSourceAndSinkTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/io/impl/csv/TemporalCSVSourceAndSinkTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/api/functions/TemporalAggregateFunctionTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/api/functions/TemporalAggregateFunctionTest.java
index a9ca24db7f19..5eff46416eef 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/api/functions/TemporalAggregateFunctionTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/api/functions/TemporalAggregateFunctionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionFactoryTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionFactoryTest.java
index 2fc540ebd4b4..c8603facada9 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionFactoryTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionTest.java
index 7fccb2837f9a..072ab0f8934e 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphCollectionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphFactoryTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphFactoryTest.java
index 7866899bd13e..7e72d208f0f6 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphFactoryTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphTest.java
index b542856b8390..6bc42f0e84d1 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/TemporalGraphTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/functions/TemporalPredicateTests.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/functions/TemporalPredicateTests.java
index 475385932852..6a78807b8b4e 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/functions/TemporalPredicateTests.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/functions/TemporalPredicateTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGVELayoutTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGVELayoutTest.java
index 50e2bc73f0ea..26d166d0fa28 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGVELayoutTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGVELayoutTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGraphCollectionLayoutFactoryTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGraphCollectionLayoutFactoryTest.java
index c5125208bace..9c105e0742a4 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGraphCollectionLayoutFactoryTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGraphCollectionLayoutFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGraphLayoutFactoryTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGraphLayoutFactoryTest.java
index d0b3ba0b3e49..dc2214aa8956 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGraphLayoutFactoryTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/layout/TemporalGraphLayoutFactoryTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractTimeAggregateFunctionTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractTimeAggregateFunctionTest.java
index ae914c230a35..9441b0e443d3 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractTimeAggregateFunctionTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AbstractTimeAggregateFunctionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageDurationTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageDurationTest.java
index 71c403bfb370..76994d214df9 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageDurationTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/AverageDurationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinMaxDurationTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinMaxDurationTest.java
index d1c7d9371104..82a9b37eba2d 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinMaxDurationTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinMaxDurationTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinMaxTimeTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinMaxTimeTest.java
index 30fcd68c6796..0be765e0f991 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinMaxTimeTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/aggregation/functions/MinMaxTimeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/diff/DiffTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/diff/DiffTest.java
index 7fbce63f6e9c..049d956456b4 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/diff/DiffTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/diff/DiffTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/diff/functions/DiffPerElementTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/diff/functions/DiffPerElementTest.java
index 64044da9818c..7ec52107bd86 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/diff/functions/DiffPerElementTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/diff/functions/DiffPerElementTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/equality/TemporalEqualityTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/equality/TemporalEqualityTest.java
index 69ce321ff1c6..a7851f9678e0 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/equality/TemporalEqualityTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/equality/TemporalEqualityTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/TemporalGroupingTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/TemporalGroupingTest.java
index 746b6fce335f..9522cb71d104 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/TemporalGroupingTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/TemporalGroupingTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeStampKeyFunctionTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeStampKeyFunctionTest.java
index e30b227088a9..15253a637e89 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeStampKeyFunctionTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/keyedgrouping/keys/TimeStampKeyFunctionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/ByTemporalPredicateTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/ByTemporalPredicateTest.java
index 050c3f989756..cbbc13e5479a 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/ByTemporalPredicateTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/ByTemporalPredicateTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/SnapshotApiTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/SnapshotApiTest.java
index 0e160cc1a96c..d3f30182b5b8 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/SnapshotApiTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/SnapshotApiTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/SnapshotTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/SnapshotTest.java
index c2b948f01e5e..dc5890c498f9 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/SnapshotTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/snapshot/SnapshotTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalCanonicalAdjacencyMatrixBuilderTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalCanonicalAdjacencyMatrixBuilderTest.java
index 6df65ac5de02..c57b57ab5c8d 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalCanonicalAdjacencyMatrixBuilderTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/operators/tostring/TemporalCanonicalAdjacencyMatrixBuilderTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalEdgeTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalEdgeTest.java
index e2436096c5b3..0f8b5b87f291 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalEdgeTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalEdgeTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalElementTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalElementTest.java
index c3b36c27e8c2..cc6ecade0830 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalElementTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalElementTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphElementTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphElementTest.java
index 7faea515595e..dd26bd3f9909 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphElementTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphElementTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHeadTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHeadTest.java
index 0959704a08d0..6b95455785b5 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHeadTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalGraphHeadTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalVertexTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalVertexTest.java
index ef95bef87fc3..3113885cbcc9 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalVertexTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/model/impl/pojo/TemporalVertexTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TemporalGradoopTestBase.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TemporalGradoopTestBase.java
index a624454a716b..1b124df8603f 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TemporalGradoopTestBase.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TemporalGradoopTestBase.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TemporalGradoopTestUtils.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TemporalGradoopTestUtils.java
index bad2bc6b3549..672cb7d263e7 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TemporalGradoopTestUtils.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TemporalGradoopTestUtils.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TimeFormatConversionTest.java b/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TimeFormatConversionTest.java
index 2ca94dcb03b1..d5be62874b83 100644
--- a/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TimeFormatConversionTest.java
+++ b/gradoop-temporal/src/test/java/org/gradoop/temporal/util/TimeFormatConversionTest.java
@@ -1,5 +1,5 @@
 /*
- * Copyright © 2014 - 2019 Leipzig University (Database Research Group)
+ * Copyright © 2014 - 2020 Leipzig University (Database Research Group)
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
diff --git a/pom.xml b/pom.xml
index 08d000a7d0b4..115412d96260 100644
--- a/pom.xml
+++ b/pom.xml
@@ -12,7 +12,7 @@
     <name>Gradoop Parent</name>
     <url>http://www.gradoop.org</url>
     <description>GRADOOP : Graph Analytics on Hadoop</description>
-    <inceptionYear>2014 - 2019</inceptionYear>
+    <inceptionYear>2014 - 2020</inceptionYear>
 
     <organization>
         <name>University of Leipzig</name>
@@ -403,7 +403,16 @@
                             <exclude>**/pom.xml</exclude>
                             <exclude>src/test/resources/**</exclude>
                             <exclude>src/main/resources/**</exclude>
+                            <exclude>src/site/site.xml</exclude>
+                            <exclude>spotbugs-exclude.xml</exclude>
+                            <exclude>.github/**</exclude>
                             <exclude>**/dev-support/**</exclude>
+                            <exclude>**/NOTICE</exclude>
+                            <exclude>**/NOTICE-binary</exclude>
+                            <exclude>licenses/**</exclude>
+                            <exclude>licenses-binary/**</exclude>
+                            <exclude>**/gradoop-common-testng.xml</exclude>
+                            <exclude>**/gradoop-hbase-testng.xml</exclude>
                         </excludes>
                         <mapping>
                             <java>SLASHSTAR_STYLE</java>