public void tearDown() {
   try {
     if (epService != null) {
       epService.destroy();
     }
   } catch (RuntimeException ex) {
     ex.printStackTrace();
   }
 }
  public void tearDown() {
    listener = null;
    listenerTwo = null;
    listenerEngineMetric = null;
    listenerStmtMetric = null;

    try {
      if (epService != null) {
        epService.destroy();
      }
    } catch (RuntimeException ex) {
      ex.printStackTrace();
    }
  }