ext_tables.php

<?php
if (!defined('TYPO3_MODE')) {
    die('Access denied.');
}

if (TYPO3_MODE === 'BE') {

    /**
     * Registers a Backend Module
     */
    \TYPO3\CMS\Extbase\Utility\ExtensionUtility::registerModule(
        'EdRush.' . $_EXTKEY,
        'tools',
        'extensiondependecies',
        '',
        array(
            'Main' => 'showDependencies',

        ),
        array(
            'access' => 'user,group',
            'icon' => 'EXT:' . $_EXTKEY . '/ext_icon.gif',
            'labels' => 'LLL:EXT:' . $_EXTKEY . '/Resources/Private/Language/locallang_extensiondependecies.xlf',
        )
    );

}

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addStaticFile($_EXTKEY, 'Configuration/TypoScript', 'Extension dependency tree');

\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addLLrefForTCAdescr('tx_edrushdependencytree_domain_model_main', 'EXT:edrush_dependency_tree/Resources/Private/Language/locallang_csh_tx_edrushdependencytree_domain_model_main.xlf');
\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::allowTableOnStandardPages('tx_edrushdependencytree_domain_model_main');