diff --git a/Models/Channel.php b/Models/Channel.php
index 798bcc5..401b68f 100755
--- a/Models/Channel.php
+++ b/Models/Channel.php
@@ -11,3 +11,17 @@
  * @link      https://jingga.app
  */
 declare(strict_types=1);
+
+namespace Modules\Messages\Models;
+
+/**
+ * Null bill type class.
+ *
+ * @package Modules\Messages\Models
+ * @license OMS License 2.0
+ * @link    https://jingga.app
+ * @since   1.0.0
+ */
+class Channel
+{
+}
diff --git a/Models/ChannelMapper.php b/Models/ChannelMapper.php
index 798bcc5..26629c3 100755
--- a/Models/ChannelMapper.php
+++ b/Models/ChannelMapper.php
@@ -11,3 +11,22 @@
  * @link      https://jingga.app
  */
 declare(strict_types=1);
+
+namespace Modules\Messages\Models;
+
+use phpOMS\DataStorage\Database\Mapper\DataMapperFactory;
+
+/**
+ * Mapper class.
+ *
+ * @package Modules\Messages\Models
+ * @license OMS License 2.0
+ * @link    https://jingga.app
+ * @since   1.0.0
+ *
+ * @template T of Email
+ * @extends DataMapperFactory<T>
+ */
+final class ChannelMapper extends DataMapperFactory
+{
+}
diff --git a/Models/Server.php b/Models/Server.php
index 798bcc5..2fa1fe0 100755
--- a/Models/Server.php
+++ b/Models/Server.php
@@ -11,3 +11,17 @@
  * @link      https://jingga.app
  */
 declare(strict_types=1);
+
+namespace Modules\Messages\Models;
+
+/**
+ * Null bill type class.
+ *
+ * @package Modules\Messages\Models
+ * @license OMS License 2.0
+ * @link    https://jingga.app
+ * @since   1.0.0
+ */
+class Server
+{
+}
diff --git a/Models/ServerMapper.php b/Models/ServerMapper.php
index 798bcc5..ec415cf 100755
--- a/Models/ServerMapper.php
+++ b/Models/ServerMapper.php
@@ -11,3 +11,22 @@
  * @link      https://jingga.app
  */
 declare(strict_types=1);
+
+namespace Modules\Messages\Models;
+
+use phpOMS\DataStorage\Database\Mapper\DataMapperFactory;
+
+/**
+ * Mapper class.
+ *
+ * @package Modules\Messages\Models
+ * @license OMS License 2.0
+ * @link    https://jingga.app
+ * @since   1.0.0
+ *
+ * @template T of Email
+ * @extends DataMapperFactory<T>
+ */
+final class ServerMapper extends DataMapperFactory
+{
+}