/**
  * Return an instance of this class.
  *
  * @since     1.0.0
  *
  * @return    object    A single instance of this class.
  */
 public static function get_instance()
 {
     // If the single instance hasn't been set, set it now.
     if (null == self::$instance) {
         self::$instance = new self();
     }
     // end if
     return self::$instance;
 }
<?php

/*
Plugin Name: Bimbler Minglers
Plugin URI: http://www.bimblers.com
Description: Plugin to implement functionality to support multuple event categories. i.e. deal with Mingler events.
Author: Paul Perkins
Version: 0.1
Author URI: http://www.bimblers.com
*/
// If this file is called directly, abort.
if (!defined('WPINC')) {
    die;
}
// end if
require_once plugin_dir_path(__FILE__) . 'class-bimbler-minglers.php';
Bimbler_Minglers::get_instance();