diff --git a/src/Prophecy/Doubler/Generator/Node/ArgumentTypeNode.php b/src/Prophecy/Doubler/Generator/Node/ArgumentTypeNode.php
index 79356ba9..73431bac 100644
--- a/src/Prophecy/Doubler/Generator/Node/ArgumentTypeNode.php
+++ b/src/Prophecy/Doubler/Generator/Node/ArgumentTypeNode.php
@@ -1,7 +1,14 @@
 <?php
 
-namespace Prophecy\Doubler\Generator\Node;
+/*
+ * This file is part of the Prophecy.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *     Marcello Duarte <marcello.duarte@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
 
-use Prophecy\Exception\Doubler\DoubleException;
+namespace Prophecy\Doubler\Generator\Node;
 
 class ArgumentTypeNode extends TypeNodeAbstract {}
diff --git a/src/Prophecy/Doubler/Generator/Node/Type/BuiltinType.php b/src/Prophecy/Doubler/Generator/Node/Type/BuiltinType.php
index 621dd6fe..6e98a59a 100644
--- a/src/Prophecy/Doubler/Generator/Node/Type/BuiltinType.php
+++ b/src/Prophecy/Doubler/Generator/Node/Type/BuiltinType.php
@@ -1,5 +1,14 @@
 <?php
 
+/*
+ * This file is part of the Prophecy.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *     Marcello Duarte <marcello.duarte@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Prophecy\Doubler\Generator\Node\Type;
 
 final class BuiltinType implements SimpleType
diff --git a/src/Prophecy/Doubler/Generator/Node/Type/IntersectionType.php b/src/Prophecy/Doubler/Generator/Node/Type/IntersectionType.php
index 8027a3bd..b0d3587a 100644
--- a/src/Prophecy/Doubler/Generator/Node/Type/IntersectionType.php
+++ b/src/Prophecy/Doubler/Generator/Node/Type/IntersectionType.php
@@ -1,5 +1,14 @@
 <?php
 
+/*
+ * This file is part of the Prophecy.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *     Marcello Duarte <marcello.duarte@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Prophecy\Doubler\Generator\Node\Type;
 
 use Prophecy\Exception\Doubler\DoubleException;
diff --git a/src/Prophecy/Doubler/Generator/Node/Type/ObjectType.php b/src/Prophecy/Doubler/Generator/Node/Type/ObjectType.php
index 7c4b0221..7a482ef7 100644
--- a/src/Prophecy/Doubler/Generator/Node/Type/ObjectType.php
+++ b/src/Prophecy/Doubler/Generator/Node/Type/ObjectType.php
@@ -1,5 +1,14 @@
 <?php
 
+/*
+ * This file is part of the Prophecy.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *     Marcello Duarte <marcello.duarte@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Prophecy\Doubler\Generator\Node\Type;
 
 final class ObjectType implements SimpleType
diff --git a/src/Prophecy/Doubler/Generator/Node/Type/SimpleType.php b/src/Prophecy/Doubler/Generator/Node/Type/SimpleType.php
index 2671970d..63a62bf8 100644
--- a/src/Prophecy/Doubler/Generator/Node/Type/SimpleType.php
+++ b/src/Prophecy/Doubler/Generator/Node/Type/SimpleType.php
@@ -1,5 +1,14 @@
 <?php
 
+/*
+ * This file is part of the Prophecy.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *     Marcello Duarte <marcello.duarte@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Prophecy\Doubler\Generator\Node\Type;
 
 interface SimpleType extends TypeInterface
diff --git a/src/Prophecy/Doubler/Generator/Node/Type/TypeInterface.php b/src/Prophecy/Doubler/Generator/Node/Type/TypeInterface.php
index 79cdcf48..121e8511 100644
--- a/src/Prophecy/Doubler/Generator/Node/Type/TypeInterface.php
+++ b/src/Prophecy/Doubler/Generator/Node/Type/TypeInterface.php
@@ -1,5 +1,14 @@
 <?php
 
+/*
+ * This file is part of the Prophecy.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *     Marcello Duarte <marcello.duarte@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Prophecy\Doubler\Generator\Node\Type;
 
 interface TypeInterface extends \Stringable
diff --git a/src/Prophecy/Doubler/Generator/Node/Type/UnionType.php b/src/Prophecy/Doubler/Generator/Node/Type/UnionType.php
index ab77e074..84f45603 100644
--- a/src/Prophecy/Doubler/Generator/Node/Type/UnionType.php
+++ b/src/Prophecy/Doubler/Generator/Node/Type/UnionType.php
@@ -1,5 +1,14 @@
 <?php
 
+/*
+ * This file is part of the Prophecy.
+ * (c) Konstantin Kudryashov <ever.zet@gmail.com>
+ *     Marcello Duarte <marcello.duarte@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
 namespace Prophecy\Doubler\Generator\Node\Type;
 
 use Prophecy\Exception\Doubler\DoubleException;