Store.php

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<?php
namespace Magento\Backend\Controller\Adminhtml\System;

use Magento\Backend\App\Action;
use Magento\Framework\App\Filesystem\DirectoryList;
use Magento\Framework\Filesystem;

abstract class Store extends Action
{
    const ADMIN_RESOURCE = 'Magento_Backend::store';

    protected $_coreRegistry;

    protected $filterManager;

    protected $resultForwardFactory;

    protected $resultPageFactory;

    public function __construct(
        \Magento\Backend\App\Action\Context $context,
        \Magento\Framework\Registry $coreRegistry,
        \Magento\Framework\Filter\FilterManager $filterManager,
        \Magento\Backend\Model\View\Result\ForwardFactory $resultForwardFactory,
        \Magento\Framework\View\Result\PageFactory $resultPageFactory
    ) {
        $this->_coreRegistry = $coreRegistry;
        $this->filterManager = $filterManager;
        parent::__construct($context);
        $this->resultForwardFactory = $resultForwardFactory;
        $this->resultPageFactory = $resultPageFactory;
    }

    protected function createPage()
    {
        $resultPage = $this->resultPageFactory->create();
        $resultPage->setActiveMenu('Magento_Backend::system_store')
            ->addBreadcrumb(__('System'), __('System'))
            ->addBreadcrumb(__('Manage Stores'), __('Manage Stores'));
        return $resultPage;
    }

    protected function _backupDatabase()
    {
        if (!$this->getRequest()->getParam('create_backup')) {
            return true;
        }
        try {
            $backupDb = $this->_objectManager->create(\Magento\Backup\Model\Db::class);
            $backup = $this->_objectManager->create(\Magento\Backup\Model\Backup::class);
            $filesystem = $this->_objectManager->get(\Magento\Framework\Filesystem::class);
            $backup->setTime(time())
                ->setType('db')
                ->setPath($filesystem->getDirectoryRead(DirectoryList::VAR_DIR)->getAbsolutePath('backups'));
            $backupDb->createBackup($backup);
            $this->messageManager->addSuccessMessage(__('The database was backed up.'));
        } catch (\Magento\Framework\Exception\LocalizedException $e) {
            $this->messageManager->addErrorMessage($e->getMessage());
            return false;
        } catch (\Exception $e) {
            $this->messageManager->addExceptionMessage(
                $e,
                __('We can\'t create a backup right now. Please try again later.')
            );
            return false;
        }
        return true;
    }

    protected function _addDeletionNotice($typeTitle)
    {
        $this->messageManager->addNoticeMessage(
            __(
                'Deleting a %1 will not delete the information associated with the %1 (e.g. categories, products, etc.)'
                . ', but the %1 will not be able to be restored. It is suggested that you create a database backup '
                . 'before deleting the %1.',
                $typeTitle
            )
        );
        return $this;
    }
}