// Prepare listeners
PluginManager pm = getServer().getPluginManager();
// add listener for other plugins
pm.registerEvents(new PluginListener(), this);
// Register our events
pm.registerEvents(gameHandler, this);
pm.registerEvents(new UpdateChecker(), this); // check updates
pm.registerEvents(new SimpleSpleefSignCommandExecutor(), this); // check sign actions
pm.registerEvents(new SimpleSpleefCommandWhitelist(), this); // check command whitelist