public FailureEvent(int NodeID, int eventType, double startTime, double endTime){
		this.NodeID = NodeID;
		if(this.eventType == null) {
	        this.eventType = new ArrayList<Integer>();
		}
		if(this.startTime == null) {
	        this.startTime = new ArrayList<Double>();
		}
		if(this.endTime == null) {
	        this.endTime = new ArrayList<Double>();
		}
		this.eventType.add(eventType);
		this.startTime.add(startTime);
		this.endTime.add(endTime);
	}