JR, can you check if the new API suits you

HEADER

@@ -0,0 +1,14 @@
+This file is part of GumTree.
+
+GumTree is free software: you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+GumTree is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License
+along with GumTree.  If not, see <http://www.gnu.org/licenses/>.

client.diff/pom.xml

@@ -1,4 +1,23 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!--
+    This file is part of GumTree.
+
+    GumTree is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    GumTree is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+    Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+-->
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <parent>
         <artifactId>gumtree</artifactId>

client.diff/src/main/java/com/github/gumtreediff/client/diff/AbstractDiffClient.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff;
 
 import com.github.gumtreediff.client.Option;

client.diff/src/main/java/com/github/gumtreediff/client/diff/AnnotatedXmlDiff.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff;
 
 import com.github.gumtreediff.client.Option;

client.diff/src/main/java/com/github/gumtreediff/client/diff/SwingDiff.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff;
 
 import com.github.gumtreediff.client.Register;

client.diff/src/main/java/com/github/gumtreediff/client/diff/WebDiff.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff;
 
 import com.github.gumtreediff.client.Option;

client.diff/src/main/java/com/github/gumtreediff/client/diff/ui/swing/MappingsPanel.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff.ui.swing;
 
 import java.awt.Color;

client.diff/src/main/java/com/github/gumtreediff/client/diff/ui/swing/SwingTree.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff.ui.swing;
 
 import com.github.gumtreediff.gen.Generators;

client.diff/src/main/java/com/github/gumtreediff/client/diff/ui/swing/TreePanel.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff.ui.swing;
 
 import com.github.gumtreediff.tree.ITree;

client.diff/src/main/java/com/github/gumtreediff/client/diff/ui/web/DiffServer.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff.ui.web;
 
 import com.github.gumtreediff.tree.Pair;

client.diff/src/main/java/com/github/gumtreediff/client/diff/ui/web/HtmlDiffs.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff.ui.web;
 
 import com.github.gumtreediff.actions.RootAndLeavesClassifier;

client.diff/src/main/java/com/github/gumtreediff/client/diff/ui/web/TagIndex.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff.ui.web;
 
 import java.util.ArrayList;

client.diff/src/main/java/com/github/gumtreediff/client/diff/ui/web/views/BootstrapHeader.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff.ui.web.views;
 
 import static org.rendersnake.HtmlAttributesFactory.*;

client.diff/src/main/java/com/github/gumtreediff/client/diff/ui/web/views/DiffView.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff.ui.web.views;
 
 import com.github.gumtreediff.client.diff.ui.web.HtmlDiffs;

client.diff/src/main/java/com/github/gumtreediff/client/diff/ui/web/views/DirectoryComparatorView.java

@@ -1,3 +1,23 @@
+/*
+ * This file is part of GumTree.
+ *
+ * GumTree is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * GumTree is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with GumTree.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * Copyright 2011-2015 Jean-Rémy Falleri <jr.falleri@gmail.com>
+ * Copyright 2011-2015 Floréal Morandat <florealm@gmail.com>
+ */
+
 package com.github.gumtreediff.client.diff.ui.web.views;
 
 import com.github.gumtreediff.tree.Pair;