Third assingment

Write a programm that acts like
"Who wants to be a millionaire?" by parsing a .csv-file
Almost ready

But I keep getting a pesky error I can not trace:

Exception in thread "main" java.lang.NullPointerException
	at java.util.ArrayList.<init>(ArrayList.java:164)
	at SimpleController.initialize(SimpleController.java:29)
	at SimpleController.<init>(SimpleController.java:15)
	at TextUI.<init>(TextUI.java:18)
	at Main.main(Main.java:4)

I wonder where does it come from.