code: protected final File getStaleFile() {
          final String staleFileName = "."
                  + (getExecution() == null ? "nonExecutionJaxb" : getExecution().getExecutionId())
                  + "-" + getStaleFileName();
          return new File(staleFileDirectory, staleFileName);
      }
docs: Acquires the staleFile for this execution
  
  @return the staleFile (used to define where) for this execution