I use PMD in my Gradle builds quite a bit. (Maybe a bit more nowadays that the FindBugs peeps seem to be struggling with that project — see this email from Andrey on this: https://mailman.cs.umd.edu/pipermail/findbugs-discuss/2016-November/004321.html). The issue I had with it is that there is no way to quickly turn off their checks for the src/test/… […]