diff --git a/component/src/main/java/com/iluwater/component/BjornInputComponent.java b/component/src/main/java/com/iluwater/component/BjornInputComponent.java
index e6b58b7dc..ec3b1e338 100644
--- a/component/src/main/java/com/iluwater/component/BjornInputComponent.java
+++ b/component/src/main/java/com/iluwater/component/BjornInputComponent.java
@@ -1,8 +1,19 @@
 package com.iluwater.component;
 
+/**
+ * BjornInputComponent is a class for our main game star
+ * This class creat a Input component for Bjorn.
+ */
 
 public class BjornInputComponent implements InputComponent {
 
+    /**
+     * This method is a logger for Bjorn when happens a Input update.
+     * In real scenario, there will be code for dealing with IO.
+     *
+     * @param gameObject is a object in the game, here it is Bjorn
+     */
+
     @Override
     public void update(GameObject gameObject) {
         gameObject.setPositionOFx(gameObject.getPositionOFx() + gameObject.getVelocity());