[ticket/12683] Improve exception handling

PHPBB3-12683

phpBB/phpbb/di/exception/di_exception.php

@@ -0,0 +1,21 @@
+<?php
+/**
+ *
+ * This file is part of the phpBB Forum Software package.
+ *
+ * @copyright (c) phpBB Limited <https://www.phpbb.com>
+ * @license GNU General Public License, version 2 (GPL-2.0)
+ *
+ * For full copyright and license information, please see
+ * the docs/CREDITS.txt file.
+ *
+ */
+
+namespace phpbb\di\exception;
+
+use phpbb\exception\runtime_exception;
+
+class di_exception extends runtime_exception
+{
+
+}

phpBB/phpbb/di/exception/multiple_service_definitions_exception.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace phpbb\di\exception;
+
+class multiple_service_definitions_exception extends di_exception
+{
+
+}

phpBB/phpbb/di/exception/service_not_found_exception.php

@@ -0,0 +1,8 @@
+<?php
+
+namespace phpbb\di\exception;
+
+class service_not_found_exception extends di_exception
+{
+
+}