8 files declare their use of DatabaseStorageController

CommentStorageController.php in drupal/core/modules/comment/lib/Drupal/comment/CommentStorageController.php
Definition of Drupal\comment\CommentStorageController.
DatabaseStorageControllerNG.php in drupal/core/lib/Drupal/Core/Entity/DatabaseStorageControllerNG.php
Definition of Drupal\Core\Entity\DatabaseStorageControllerNG.
FileStorageController.php in drupal/core/modules/file/lib/Drupal/file/FileStorageController.php
Definition of Drupal\file\FileStorageController.
NodeStorageController.php in drupal/core/modules/node/lib/Drupal/node/NodeStorageController.php
Definition of Drupal\node\NodeStorageController.
TermStorageController.php in drupal/core/modules/taxonomy/lib/Drupal/taxonomy/TermStorageController.php
Definition of Drupal\taxonomy\TermStorageController.
TestEntityController.php in drupal/core/modules/field/tests/modules/field_test/lib/Drupal/field_test/TestEntityController.php
Definition of Drupal\field_test\TestEntityController.
UserStorageController.php in drupal/core/modules/user/lib/Drupal/user/UserStorageController.php
Definition of Drupal\user\UserStorageController.
VocabularyStorageController.php in drupal/core/modules/taxonomy/lib/Drupal/taxonomy/VocabularyStorageController.php
Definition of VocabularyStorageController.