diff --git a/bin/bank/BankAccount.class b/bin/bank/BankAccount.class
index afd2757..86371de 100644
Binary files a/bin/bank/BankAccount.class and b/bin/bank/BankAccount.class differ
diff --git a/src/bank/BankAccount.java b/src/bank/BankAccount.java
index 0b8d81f..33df7aa 100644
--- a/src/bank/BankAccount.java
+++ b/src/bank/BankAccount.java
@@ -2,6 +2,7 @@ package bank;
 
 /**
  * Create a bank account with a balance and a owner
+ * General abstract class for used in specific other bank account
  */
 public abstract class BankAccount {
     protected double balance;
@@ -9,7 +10,7 @@ public abstract class BankAccount {
 
     /**
      * Get balance of the account
-     * @return the balance of the account
+     * @return The balance of the account
      */
     public double getBalance() {
         return balance;
@@ -18,7 +19,7 @@ public abstract class BankAccount {
     /**
      * Deposit an amount on your account
      * Check the amount for accept only positive amount.
-     * @param amount
+     * @param amount The amount you want to deposit (have to be positive).
      */
     public void deposit(double amount){
         if(amount<0){
@@ -31,7 +32,7 @@ public abstract class BankAccount {
     /**
      * Withdraw an amount on your account
      * Check the amount for be sure you have this money
-     * @param amount The amount you want to withdraw
+     * @param amount The amount you want to withdraw (have to be less or equal to the money you have)
      * @return true : if the withdraw has been done
      */
     public boolean withdraw(double amount){
@@ -43,9 +44,10 @@ public abstract class BankAccount {
     }
 
     /**
-     * Explain the problem, if something is wrong
-     * @param text
-     * @return the explanation of the problem
+     * Explain the problem, if something is wrong. And print it on terminal.
+     * 
+     * @param text The description of your specific error
+     * @return return always false. Can be used for check if have a problem
      */
     protected boolean error(String text){
         System.out.println("Problem : " + text);