SomeFunctions.java

public class RegisterHandler {
    @SubscribeEvent
    public void RegisterItems(RegistryEvent.Register<Item> event) {
        for(int itemIndex = 0; itemIndex < ModItems.items.size(); itemIndex++){
            Item item = ModItems.items.get(itemIndex);
            event.getRegistry().register(item);

            ModLogger.LogInfo("Item Registered: " + item.getUnlocalizedName());
        }
    }
}

@Mod.EventHandler
    public void preInit(FMLPreInitializationEvent event)
    {
        ModLogger.InitializeLogger(event);

        MinecraftForge.EVENT_BUS.register(RegisterHandler.class);
    }