Following this checklist to help us incorporate your 
contribution quickly and easily:

 - [ ] Each commit in the pull request should have a meaningful subject line and body.
 - [ ] Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
 - [ ] Rember to add the correct license header to new files.
 - [ ] Run `mvn clean verify` to make sure basic checks pass. A more thorough check will 
       be performed on your pull request automatically.

To make clear that you license your contribution under 
the [Apache License Version 2.0, January 2004](http://www.apache.org/licenses/LICENSE-2.0)
you have to acknowledge this by using the following check-box.

 - [ ] I hereby declare this contribution to be licenced under the [Apache License Version 2.0, January 2004](http://www.apache.org/licenses/LICENSE-2.0)
