diff --git a/src/main/java/net/sf/jabref/BibtexEntryTypes.java b/src/main/java/net/sf/jabref/BibtexEntryTypes.java
index e938499a353..9cae90721b2 100644
--- a/src/main/java/net/sf/jabref/BibtexEntryTypes.java
+++ b/src/main/java/net/sf/jabref/BibtexEntryTypes.java
@@ -1,3 +1,20 @@
+/**
+ * Copyright (C) 2015 JabRef contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
 package net.sf.jabref;
 
 public class BibtexEntryTypes {
diff --git a/src/main/java/net/sf/jabref/logic/l10n/EncodingControl.java b/src/main/java/net/sf/jabref/logic/l10n/EncodingControl.java
index ab4e778f654..4f1af6976a4 100644
--- a/src/main/java/net/sf/jabref/logic/l10n/EncodingControl.java
+++ b/src/main/java/net/sf/jabref/logic/l10n/EncodingControl.java
@@ -1,3 +1,20 @@
+/**
+ * Copyright (C) 2015 JabRef contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
 package net.sf.jabref.logic.l10n;
 
 import java.io.IOException;
diff --git a/src/main/java/net/sf/jabref/logic/l10n/Localization.java b/src/main/java/net/sf/jabref/logic/l10n/Localization.java
index 22cd1956187..8ab4d63ac52 100644
--- a/src/main/java/net/sf/jabref/logic/l10n/Localization.java
+++ b/src/main/java/net/sf/jabref/logic/l10n/Localization.java
@@ -1,3 +1,20 @@
+/**
+ * Copyright (C) 2015 JabRef contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
 package net.sf.jabref.logic.l10n;
 
 import org.apache.commons.logging.Log;
diff --git a/src/main/java/net/sf/jabref/logic/util/OS.java b/src/main/java/net/sf/jabref/logic/util/OS.java
index ca5909c1eb4..42c56f22be9 100644
--- a/src/main/java/net/sf/jabref/logic/util/OS.java
+++ b/src/main/java/net/sf/jabref/logic/util/OS.java
@@ -1,3 +1,20 @@
+/**
+ * Copyright (C) 2015 JabRef contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
 package net.sf.jabref.logic.util;
 
 /***
diff --git a/src/test/java/net/sf/jabref/logic/remote/RemoteUtilTest.java b/src/test/java/net/sf/jabref/logic/remote/RemoteUtilTest.java
index b0b73f59a12..90803f20c73 100644
--- a/src/test/java/net/sf/jabref/logic/remote/RemoteUtilTest.java
+++ b/src/test/java/net/sf/jabref/logic/remote/RemoteUtilTest.java
@@ -1,3 +1,20 @@
+/**
+ * Copyright (C) 2015 JabRef contributors
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
 package net.sf.jabref.logic.remote;
 
 import junit.framework.Assert;