code: @FFDCIgnore(NullPointerException.class)
  	private void addEventToRingBuffer(Object event) {
  		// Check again to see if the ringBuffer is null
  		if (ringBuffer != null) {
  			try {
  				ringBuffer.add(event);
  			} catch (NullPointerException npe) {
  				// Nothing to do! Perhaps a Trace?
  			}
  		}
  	}
docs: Method to add events to the ringBufferthat and ignores a possible NPE
  with ringBuffer which is due to the removeHandler method call from this
  same class
  
  We do not wish synchronize the add for every ringBuffer due to
  performance impacts
  
  @param event
  event to add to the buffer