3 files changed, 34 insertions, 2 deletions
diff --git a/lib/public/AppFramework/Db/DoesNotExistException.php b/lib/public/AppFramework/Db/DoesNotExistException.php
index b8adc36c7ba..9823a0a1fa8 100644
--- a/lib/public/AppFramework/Db/DoesNotExistException.php
+++ b/lib/public/AppFramework/Db/DoesNotExistException.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
  *
@@ -30,7 +31,7 @@ namespace OCP\AppFramework\Db;
  * entry in the database
  * @since 7.0.0
  */
-class DoesNotExistException extends \Exception {
+class DoesNotExistException extends \Exception implements IMapperException {
 
 	/**
 	 * Constructor
diff --git a/lib/public/AppFramework/Db/IMapperException.php b/lib/public/AppFramework/Db/IMapperException.php
new file mode 100644
index 00000000000..dbb9883ae88
--- /dev/null
+++ b/lib/public/AppFramework/Db/IMapperException.php
@@ -0,0 +1,30 @@
+<?php
+declare(strict_types=1);
+/**
+ * @copyright Copyright (c) 2018, Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @author Roeland Jago Douma <roeland@famdouma.nl>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+namespace OCP\AppFramework\Db;
+
+/**
+ * @since 16.0.0
+ */
+interface IMapperException {}
diff --git a/lib/public/AppFramework/Db/MultipleObjectsReturnedException.php b/lib/public/AppFramework/Db/MultipleObjectsReturnedException.php
index a17d95e0ef1..3955c417d57 100644
--- a/lib/public/AppFramework/Db/MultipleObjectsReturnedException.php
+++ b/lib/public/AppFramework/Db/MultipleObjectsReturnedException.php
@@ -1,4 +1,5 @@
 <?php
+declare(strict_types=1);
 /**
  * @copyright Copyright (c) 2016, ownCloud, Inc.
  *
@@ -30,7 +31,7 @@ namespace OCP\AppFramework\Db;
  * row
  * @since 7.0.0
  */
-class MultipleObjectsReturnedException extends \Exception {
+class MultipleObjectsReturnedException extends \Exception implements IMapperException {
 
 	/**
 	 * Constructor