diff --git a/core/lib/Drupal/Core/Entity/ContentEntityDatabaseStorage.php b/core/lib/Drupal/Core/Entity/ContentEntityDatabaseStorage.php
index 74a821c..3d506d0 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityDatabaseStorage.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityDatabaseStorage.php
@@ -43,7 +43,7 @@ class ContentEntityDatabaseStorage extends ContentEntityStorageBase implements S
   /**
    * A mapping of schema fields that will be stored per entity table.
    *
-   * @var \Drupal\Core\Entity\Sql\DefaultTableMapping
+   * @var \Drupal\Core\Entity\Sql\TableMappingInterface
    */
   protected $tableMapping;
 
@@ -269,7 +269,6 @@ public function getTableMapping() {
         // denormalized in the base table but also stored in the revision table
         // together with the entity ID and the revision ID as identifiers.
         $this->tableMapping->setFieldNames($this->baseTable, array_diff($all_fields, $revision_metadata_fields));
-
         $revision_key_fields = array($this->idKey, $this->revisionKey);
         $this->tableMapping->setFieldNames($this->revisionTable, array_merge($revision_key_fields, $revisionable_fields));
       }
diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlStorageInterface.php b/core/lib/Drupal/Core/Entity/Sql/SqlStorageInterface.php
index d16b3c8..8a0bc1b 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlStorageInterface.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlStorageInterface.php
@@ -5,6 +5,7 @@
  */
 
 namespace Drupal\Core\Entity\Sql;
+
 use Drupal\Core\Entity\EntityStorageInterface;
 
 /**