Ignoring Eclipse generated file for check style.
NullPointerException fix.

See: https://groups.google.com/forum/#!topic/m2e-code-quality/_QGGBPIzpxg
In preparation for merge.

See http://git-scm.com/book/en/v2/Customizing-Git-Git-Attributes#Merge-Strategies and http://stackoverflow.com/a/15233458
Merge branch 'hotfix/eclipse-checkstyle'