log(Level.INFO, "Register event listeners.", true);
registerEvents(new PlayerListener (this));
registerEvents(new BlockListener (this));
registerEvents(new WorldListener (this));
registerEvents(new InventoryListener(this));
registerEvents(new EntityListener (this));
registerEvents(new ShowCaseStandalonePluginListener(this));
// main listener
registerEvents(new ShowCaseExecutingListener(this));