Add tests for ErrorProne.

[vanniktech]

No description provided.

[codecov]

Codecov Report

Merging #114 into master will increase coverage by 3.28%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #114      +/-   ##
============================================
+ Coverage     79.34%   82.62%   +3.28%     
- Complexity       77       84       +7     
============================================
  Files             2        2              
  Lines           213      213              
  Branches         30       30              
============================================
+ Hits            169      176       +7     
+ Misses           34       25       -9     
- Partials         10       12       +2

Impacted Files	Coverage Δ	Complexity Δ
...h/code/quality/tools/CodeQualityToolsPlugin.groovy	82.29% <0%> (+3.34%)	84% <0%> (+7%)	⬆️

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