le cleanup

GraylogServer.java

public void registerInitializer(Initializer initializer) {
    this.initializers.add(initializer);
}

@Override
public void run() {

    ...

    // Call all registered initializers.
    for (Initializer initializer : this.initializers) {
        initializer.initialize();
        LOG.debug("Initialized: " + initializer.getClass().getSimpleName());
    }

    ...

}

Main.java

// Le server object. This is where all the magic happens.
GraylogServer server = new GraylogServer(configuration);

// Register initializers.
server.registerInitializer(new SyslogServerInitializer(server, configuration));
server.registerInitializer(new DroolsInitializer(server, configuration));
server.registerInitializer(new HostCounterCacheInitializer(server));

// Blocks until we shut down.
server.run();