PMD-Eclipse Rules Configuration

When I first installed the PMD Eclipse plugin and ran a code check on my codebase, PMD displayed no errors. The first thought was, "My code is perfect!". On second thought, PMD was not configured properly.

Unlike FindBug or CheckStyle, by default PMD is not configured to check for any coding violation rules. (At least this is true on my Mac Eclipse Juno.). You have to go to Eclipse Preferences -> PMD -> Rule Configuration and check the rules you want to use.