Rename files OWLDescriptionChecker.java and OWLDescriptionSetChecker.java to match the classes they contain. This stops maven from recompiling every single java file every single time.

This wasn't getting flagged as an error, because the classes are package local in scope (if they had been public, there would have been  complaints).

org.protege.editor.owl/src/main/java/org/protege/editor/owl/ui/clsdescriptioneditor/OWLClassExpressionSetChecker.java

@@ -46,4 +46,4 @@ class OWLClassExpressionSetChecker implements OWLExpressionChecker<Set<OWLClassE
             throw ParserUtil.convertException(e);
         }
     }
-}
+}