diff --git a/core/include/cubos/core/ecs/resource/module.dox b/core/include/cubos/core/ecs/resource/module.dox
new file mode 100644
index 000000000..1542f321d
--- /dev/null
+++ b/core/include/cubos/core/ecs/resource/module.dox
@@ -0,0 +1,9 @@
+/// @dir
+/// @brief @ref core-ecs-resource directory.
+
+namespace cubos::core::ecs
+{
+    /// @defgroup core-ecs-resource Resource
+    /// @ingroup core-ecs
+    /// @brief Resource part of the ECS.
+}