Events

BedWars1058 is providing A LOT of events. You can see them on the JavaDocs.

@EventHandler
public void onEnemyEnter(EnemyBaseEnterEvent e) {
  //stuff
}

@EventHandler
public void onTeamAssign(TeamAssignEvent e) {
  //stuff
}

@EventHandler
public void onArenaJoin(PlayerJoinArenaEvent e) {
  //stuff
}