private function createDocuments()
 {
     try {
         $page = Page::getByPath(self::DOCUMENT_PAGE_DEMOSIMPLE_PATH);
         if (!is_object($page)) {
             $page = new Page();
             $page->setParent(Page::getByPath('/'));
             $page->setKey(basename(self::DOCUMENT_PAGE_DEMOSIMPLE_PATH));
             $page->setModule(self::CLASS_PARTICIPATION_NAME);
             $page->setController('Demo');
             $page->setAction('simple');
             $page->save();
         }
     } catch (\Exception $exception) {
         throw new \Exception('Unable to create simple demo page [' . Plugin::DOCUMENT_PAGE_DEMOSIMPLE_PATH . ']: ' . $exception->getMessage());
     }
 }