ExampleAPI.php

<?php
/**
 * Piwik - free/libre analytics platform
 *
 * @link http://piwik.org
 * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later
 *
 */
namespace Piwik\Plugins\ExampleAPI;

/**
 * This plugin only provides an API.php file, so we leave the plugin class empty
 *
 */
class ExampleAPI extends \Piwik\Plugin
{

}