--- /dev/null
+<?php
+
+/*
+ * This file is part of the Behat Testwork.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Behat\Testwork\ServiceContainer\Exception;
+
+use RuntimeException;
+
+/**
+ * Extension exception.
+ *
+ * @author Konstantin Kudryashov <ever.zet@gmail.com>
+ */
+class ExtensionException extends RuntimeException implements ServiceContainerException
+{
+ /**
+ * @var string
+ */
+ private $extensionName;
+
+ /**
+ * Initializes exception.
+ *
+ * @param string $message
+ * @param string $extensionName
+ */
+ public function __construct($message, $extensionName)
+ {
+ $this->extensionName = $extensionName;
+
+ parent::__construct($message);
+ }
+
+ /**
+ * Returns name of the extension that caused exception.
+ *
+ * @return string
+ */
+ public function getExtensionName()
+ {
+ return $this->extensionName;
+ }
+}