diff --git a/core/lib/Drupal/Core/Database/DatabaseNotFoundException.php b/core/lib/Drupal/Core/Database/DatabaseNotFoundException.php
new file mode 100644
index 000000000000..fa1327f59ca9
--- /dev/null
+++ b/core/lib/Drupal/Core/Database/DatabaseNotFoundException.php
@@ -0,0 +1,12 @@
+<?php
+/**
+ * @file
+ * Contains Drupal\Core\Database\DatabaseNotFoundException.
+ */
+
+namespace Drupal\Core\Database;
+
+/**
+ * Exception thrown if specified database is not found.
+ */
+class DatabaseNotFoundException extends \RuntimeException {}