diff --git a/rosbag2_examples/rosbag2_examples_cpp/src/simple_bag_player.cpp b/rosbag2_examples/rosbag2_examples_cpp/src/simple_bag_player.cpp
index 124c00585..522059bfb 100644
--- a/rosbag2_examples/rosbag2_examples_cpp/src/simple_bag_player.cpp
+++ b/rosbag2_examples/rosbag2_examples_cpp/src/simple_bag_player.cpp
@@ -1,5 +1,18 @@
+// Copyright 2024 Open Source Robotics Foundation
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
 #include <chrono>
-#include <functional>
 #include <iostream>
 #include <memory>
 #include <string>
@@ -13,46 +26,47 @@ using namespace std::chrono_literals;
 
 class SimpleBagPlayer : public rclcpp::Node
 {
-  public:
-    SimpleBagPlayer(const std::string & bag_filename)
-    : Node("playback_node")
-    {
-      publisher_ = this->create_publisher<std_msgs::msg::String>("chatter", 10);
-
-      timer_ = this->create_wall_timer(100ms,
-          [this](){return this->timer_callback();}
-      );
-
-      reader_.open(bag_filename);
-    }
+public:
+  explicit SimpleBagPlayer(const std::string & bag_filename)
+  : Node("playback_node")
+  {
+    publisher_ = this->create_publisher<std_msgs::msg::String>("chatter", 10);
+
+    timer_ = this->create_wall_timer(
+      100ms,
+      [this](){return this->timer_callback();}
+    );
+
+    reader_.open(bag_filename);
+  }
 
-  private:
-    void timer_callback()
-    {
-      while (reader_.has_next()) {
-        rosbag2_storage::SerializedBagMessageSharedPtr msg = reader_.read_next();
+private:
+  void timer_callback()
+  {
+    while (reader_.has_next()) {
+      rosbag2_storage::SerializedBagMessageSharedPtr msg = reader_.read_next();
 
-        if (msg->topic_name != "chatter") {
-          continue;
-        }
+      if (msg->topic_name != "chatter") {
+        continue;
+      }
 
-        rclcpp::SerializedMessage serialized_msg(*msg->serialized_data);
-        std_msgs::msg::String::SharedPtr ros_msg = std::make_shared<std_msgs::msg::String>();
+      rclcpp::SerializedMessage serialized_msg(*msg->serialized_data);
+      std_msgs::msg::String::SharedPtr ros_msg = std::make_shared<std_msgs::msg::String>();
 
-        serialization_.deserialize_message(&serialized_msg, ros_msg.get());
+      serialization_.deserialize_message(&serialized_msg, ros_msg.get());
 
-        publisher_->publish(*ros_msg);
-        std::cout << ros_msg->data << "\n";
+      publisher_->publish(*ros_msg);
+      std::cout << ros_msg->data << "\n";
 
-        break;
-      }
+      break;
     }
+  }
 
-    rclcpp::TimerBase::SharedPtr timer_;
-    rclcpp::Publisher<std_msgs::msg::String>::SharedPtr publisher_;
+  rclcpp::TimerBase::SharedPtr timer_;
+  rclcpp::Publisher<std_msgs::msg::String>::SharedPtr publisher_;
 
-    rclcpp::Serialization<std_msgs::msg::String> serialization_;
-    rosbag2_cpp::Reader reader_;
+  rclcpp::Serialization<std_msgs::msg::String> serialization_;
+  rosbag2_cpp::Reader reader_;
 };
 
 int main(int argc, char ** argv)
@@ -67,4 +81,4 @@ int main(int argc, char ** argv)
   rclcpp::shutdown();
 
   return 0;
-}
\ No newline at end of file
+}
diff --git a/rosbag2_examples/rosbag2_examples_py/rosbag2_examples_py/simple_bag_player.py b/rosbag2_examples/rosbag2_examples_py/rosbag2_examples_py/simple_bag_player.py
index da897e1d6..e09da9e33 100644
--- a/rosbag2_examples/rosbag2_examples_py/rosbag2_examples_py/simple_bag_player.py
+++ b/rosbag2_examples/rosbag2_examples_py/rosbag2_examples_py/simple_bag_player.py
@@ -12,6 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 import sys
+
 import rclpy
 from rclpy.node import Node
 from rclpy.serialization import deserialize_message
@@ -43,7 +44,6 @@ def timer_callback(self):
             self.get_logger().info(ros_msg.data)
 
 
-
 def main(args=None):
     rclpy.init(args=args)
     sbr = SimpleBagPlayer(sys.argv[1])