I like PMD. I'm neutral on sharing IDE configs, because it'll inevitably mean inconsistent settings so seems futile. (Our settings already are.) So I personally am not motivated to check in IntelliJ configs.
For the moment, let me suggest a non-controversial change: I could not find any reference at all to files in the following directories, and, at least, Maven works fine without them. It does seem like every reference is to the other copy. etc/ eclipse/src/main/resources/
