[ticket/10631] Simplify exceptions

PHPBB-10631

phpBB/includes/extension/exception.php

@@ -0,0 +1,27 @@
+<?php
+/**
+*
+* @package extension
+* @copyright (c) 2012 phpBB Group
+* @license http://opensource.org/licenses/gpl-2.0.php GNU General Public License v2
+*
+*/
+
+/**
+* @ignore
+*/
+if (!defined('IN_PHPBB'))
+{
+	exit;
+}
+
+/**
+ * Exception class for metadata
+ */
+class phpbb_extension_exception extends UnexpectedValueException
+{
+	public function __toString()
+	{
+		return $this->getMessage();
+	}
+}