feat: add exception class

Author: xchopin

src/Exception/BadRequestException.php

@@ -0,0 +1,18 @@
+<?php
+
+/**
+ *
+ * NotFoundException class
+ *
+ * @copyright Apereo
+ * @category Exception
+ * @package  OpenLRW
+ * @author   Xavier Chopin <bonjour@xavierchop.in>
+ * @license  http://www.osedu.org/licenses/ECL-2.0 ECL-2.0 License
+ */
+
+namespace OpenLRW\Exception;
+
+final class BadRequestException extends \RuntimeException implements Exception
+{
+}

src/Exception/InternalServerErrorException.php

@@ -0,0 +1,18 @@
+<?php
+
+/**
+ *
+ * NotFoundException class
+ *
+ * @copyright Apereo
+ * @category Exception
+ * @package  OpenLRW
+ * @author   Xavier Chopin <bonjour@xavierchop.in>
+ * @license  http://www.osedu.org/licenses/ECL-2.0 ECL-2.0 License
+ */
+
+namespace OpenLRW\Exception;
+
+final class InternalServerErrorException extends \RuntimeException implements Exception
+{
+}