//Events:
//Called when the game starts.
GameStartEvent (Game game )

//Called when the game ends.
GameEndEvent (Game game )

//Called when the game changes its state. (waiting, starting, playing, ending)
GameStateChangeEvent (Game game, GameState stageFrom, GameState stageTo )
//Example how to use:
@EventHandler
public void OnGameEndEvent (GameEndEvent e ) {
  System. out. println ( "Game end event!" ) ;
}