diff --git a/src/Exception/ExceptionInterface.php b/src/Exception/ExceptionInterface.php
index a66fc1c..7d95dbb 100644
--- a/src/Exception/ExceptionInterface.php
+++ b/src/Exception/ExceptionInterface.php
@@ -1,4 +1,15 @@
 <?php
+/**
+ * This file is a part of Nenglish7/ConstantPolyfill.
+ *
+ * @author Nicholas English                        <https://github.com/Nenglish7>.
+ * @author Nenglish7/ConstantPolyfill Contributors <https://github.com/Nenglish7/ConstantPolyfill/graphs/contributors>.
+ *
+ * @copyright 2018 Nicholas English.
+ *
+ * @license <https://github.com/Nenglish7/ConstantPolyfill/blob/master/LICENSE> MIT License.
+ */
+
 namespace Nenglish7\ConstantPolyfill\Exception;
 
 /**