Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/locale/src/StringStorageException.php

@@ -0,0 +1,13 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\locale\StringStorageException.
+ */
+
+namespace Drupal\locale;
+
+/**
+ * Defines an exception thrown when storage operations fail.
+ */
+class StringStorageException extends \Exception {}