diff --git a/src/BillGUI/BillGui.java b/src/BillGUI/BillGui.java
index d7e3b3d..aebb821 100644
--- a/src/BillGUI/BillGui.java
+++ b/src/BillGUI/BillGui.java
@@ -6,10 +6,17 @@ import javax.swing.*;
 import java.awt.print.*;
 import java.awt.image.BufferedImage;
 
+/**
+ * generate the bill in a window
+ */
 public class BillGui extends JFrame{
     String bill;
     JPanel jP;
 
+    /**
+     * initialize the bill in a window
+     * @param bill string who contains the bill
+     */
     BillGui(String bill){
         this.bill = bill;
 
@@ -20,17 +27,19 @@ public class BillGui extends JFrame{
         FlowLayout fl = new FlowLayout();
 		this.setLayout(fl);
 
+        //Create the label who contain the label with the bill
         jP = new JPanel();
-
         JLabel jBill = new JLabel(bill);
         jP.add(jBill);
-        
         this.add(jP);
 
+        //Create the button for print the bill
         JButton buttonPrint = new JButton("Print");
-        buttonPrint.addActionListener(
-        
-            new ButtonListenerBill(this) {
+        buttonPrint.addActionListener(new ButtonListenerBill(this) {
+            //TODO : describe the prozess to print and resize the bill
+            /**
+             * 
+             */
             @Override
             public void actionPerformed(ActionEvent e){
 
@@ -77,17 +86,19 @@ public class BillGui extends JFrame{
 }
 
 /**
- * 
+ * listener to detect the button to print the bill
  */
 class ButtonListenerBill implements ActionListener {
     JFrame Jf;
-
+    /**
+     * initialize the listener 
+     * @param Jf //TODO : do we always use the JFrame ?
+     */
     ButtonListenerBill(JFrame Jf){
         this.Jf = Jf;
     }
-    
     @Override
-    public void actionPerformed(ActionEvent e){  };
+    public void actionPerformed(ActionEvent e){};
 }