Basic WordPress plugin, non-OOP

my-plugin.php

<?php
/**
 * Plugin Name: My Custom Post Types
 * Plugin URI: http://URI_Of_Page_Describing_Plugin_and_Updates
 * Description: A brief description of the Plugin.
 * Version: 1.0.0
 * Author: My Name
 * Author URI: http://URI_Of_The_Plugin_Author
 * License: A "Slug" license name e.g. GPL2
 */
 add_action( 'init', 'my_register_post_types' );
 function my_register_post_types() {
 	$args = array();
 	register_post_type( 'post_type_name', $args );
 }