Yep, the plugin works!! License headers automatically added.

Author: emacarron

src/test/java/org/apache/ibatis/submitted/batch_test/BatchTest.java

@@ -1,5 +1,5 @@
-/*
- *    Copyright 2009-2013 the original author or authors.
+/**
+ *    Copyright 2009-2015 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.

src/test/java/org/apache/ibatis/submitted/batch_test/Dept.java

@@ -1,5 +1,5 @@
-/*
- *    Copyright 2009-2012 the original author or authors.
+/**
+ *    Copyright 2009-2015 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.

src/test/java/org/apache/ibatis/submitted/batch_test/Mapper.java

@@ -1,5 +1,5 @@
-/*
- *    Copyright 2009-2012 the original author or authors.
+/**
+ *    Copyright 2009-2015 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.

src/test/java/org/apache/ibatis/submitted/batch_test/User.java

@@ -1,5 +1,5 @@
-/*
- *    Copyright 2009-2012 the original author or authors.
+/**
+ *    Copyright 2009-2015 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.

src/test/java/org/apache/ibatis/submitted/bringrags/SimpleChildObject.java

@@ -1,5 +1,5 @@
 /**
- *    Copyright 2015 the original author or authors.
+ *    Copyright 2009-2015 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.

src/test/java/org/apache/ibatis/submitted/bringrags/SimpleChildObjectMapper.java

@@ -1,5 +1,5 @@
 /**
- *    Copyright 2015 the original author or authors.
+ *    Copyright 2009-2015 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.

src/test/java/org/apache/ibatis/submitted/bringrags/SimpleObject.java

@@ -1,5 +1,5 @@
 /**
- *    Copyright 2015 the original author or authors.
+ *    Copyright 2009-2015 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.

src/test/java/org/apache/ibatis/submitted/bringrags/SimpleObjectTest.java

@@ -1,5 +1,5 @@
 /**
- *    Copyright 2015 the original author or authors.
+ *    Copyright 2009-2015 the original author or authors.
  *
  *    Licensed under the Apache License, Version 2.0 (the "License");
  *    you may not use this file except in compliance with the License.