code: public void auditActorStopEvent(RFC3881EventOutcomeCodes eventOutcome, String actorName, String actorStopper) 
  	{
  		if (!isAuditorEnabled()) {
  			return;
  		}
  		ApplicationStopEvent stopEvent = new ApplicationStopEvent(eventOutcome);
  		stopEvent.setAuditSourceId(getAuditSourceId(), getAuditEnterpriseSiteId());
  		stopEvent.addApplicationParticipant(actorName, null, null, getSystemNetworkId());
  		if (!EventUtils.isEmptyOrNull(actorStopper)) {
  			stopEvent.addApplicationStarterParticipant(actorStopper, null, null, null);
  		}
  		audit(stopEvent);
  	}
docs: Sends a DICOM Application Activity / Application Stop Event audit message
  
  @param eventOutcome Event Outcome Indicator
  @param actorName	Application Participant User ID (Actor Name)
  @param actorStopper Application Starter Participant User ID (Actor Starter Name)