diff --git a/core/lib/Drupal/Core/Database/DatabaseExceptionInterface.php b/core/lib/Drupal/Core/Database/DatabaseException.php
similarity index 61%
copy from core/lib/Drupal/Core/Database/DatabaseExceptionInterface.php
copy to core/lib/Drupal/Core/Database/DatabaseException.php
index 8954674..741bb23 100644
--- a/core/lib/Drupal/Core/Database/DatabaseExceptionInterface.php
+++ b/core/lib/Drupal/Core/Database/DatabaseException.php
@@ -9,5 +9,10 @@
  * caught collectively.  Note that this applies only to Drupal-spawned
  * exceptions.  PDOException will not implement this interface and module
  * developers should account for it separately.
+ *
+ * @deprecated in Drupal 8.2.x for removal before Drupal 9.0.0. Use
+ * Drupal\Core\Database\DatabaseExceptionInterface instead.
  */
-interface DatabaseExceptionInterface { }
+// @codingStandardsIgnoreStart
+interface DatabaseException {}
+// @codingStandardsIgnoreEnd
diff --git a/core/lib/Drupal/Core/Database/DatabaseExceptionInterface.php b/core/lib/Drupal/Core/Database/DatabaseExceptionInterface.php
index 8954674..93190f6 100644
--- a/core/lib/Drupal/Core/Database/DatabaseExceptionInterface.php
+++ b/core/lib/Drupal/Core/Database/DatabaseExceptionInterface.php
@@ -9,5 +9,10 @@
  * caught collectively.  Note that this applies only to Drupal-spawned
  * exceptions.  PDOException will not implement this interface and module
  * developers should account for it separately.
+ *
+ * Note that this interface extends DatabaseException. This is for
+ * backwards-compatibility since DatabaseException is deprecated.
+ * DatabaseException will be removed at some point, and this interface will no
+ * longer extend it.
  */
-interface DatabaseExceptionInterface { }
+interface DatabaseExceptionInterface extends DatabaseException {}