PMD is a Java source code analyzer. It finds unused variables, empty catch blocks, unnecessary object creation, and so forth. This release fixes a few bugs in the 4.2.2 version but does not introduce major changes. The refactoring effort that will lead to PMD 5.0 has been started on the main trunk (5.0 will not be backward compatible with PMD 4.x). There may be other 4.2.x versions with minor fixes if needed until 5.0 is released.