diff --git a/examples/openapi3_rails/app/controllers/application_controller.rb b/examples/openapi3_rails/app/controllers/application_controller.rb
index 4ac8823b..1d16b58a 100644
--- a/examples/openapi3_rails/app/controllers/application_controller.rb
+++ b/examples/openapi3_rails/app/controllers/application_controller.rb
@@ -1,2 +1,4 @@
-class ApplicationController < ActionController::API
-end
+# ApplicationController serves as the base class for all API controllers in the OpenAPI3 Rails example.
+# It provides common functionality and inherits from ActionController::API for API-specific handling.
+class ApplicationController < ActionController::API
+end