WIP Getting things to work [Fail]

Actual issue :

Exception in thread "AWT-EventQueue-0" java.lang.ClassCastException:
miagesorbonne.geniusbot.entity.Keyword cannot be cast to
java.lang.String
	at miagesorbonne.geniusbot.entity.Step.getMessage(Step.java:79)
	at
miagesorbonne.geniusbot.controller.BotController.getMessage(BotControlle
r.java:44)
	at miagesorbonne.geniusbot.view.Main.<init>(Main.java:32)