Create ApplicationException.php (#3)

To support application code errors

src/ApplicationException.php

@@ -0,0 +1,43 @@
+<?php
+/**
+ * Copyright 2015 - 2016 Xenofon Spafaridis
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+namespace Phramework\Exceptions;
+/**
+ * Application Exception with additional application code
+ * Used to throw an \Exception, when there is something wrong with the request.
+ * @license https://www.apache.org/licenses/LICENSE-2.0 Apache-2.0
+ * @author Xenofon Spafaridis <[email protected]>
+ * @since 0.1.0
+ */
+class ApplicationException extends \Exception
+{
+    /**
+     * @var int
+     */
+    protected $applicationCode;
+
+    public function __construct(string $message, int $applicationCode, int $statusCode = 400)
+    {
+        parent::__construct($message, $statusCode);
+
+        $this->applicationCode = $applicationCode;
+    }
+
+    public function getApplicationCode(): int
+    {
+        return $this->applicationCode;
+    }
+}