Added some documentation to the code.

fixed a slight bug in the encofing of user data where evry user had the same password of "pass".

src/main/java/me/zacharias/bank/BankAccount.java

@@ -3,9 +3,13 @@ package me.zacharias.bank;
 import static me.zacharias.bank.Account.Interests.BANK_ACCOUNT_INTEREST_RATE;
 
 /**
- * This class only works as a way to have prefilled information, but can be replaced by just calling the {@link Account#Account(String, double, double)} instead
+ * This class only works as a way to have prefilled information, but can be replaced by just calling the {@link Account#Account(String, double)} instead
  */
 public class BankAccount extends Account {
+    /**
+     * Creates a new BankAccount with the given name.
+     * @param name The name of the account
+     */
     public BankAccount(String name) {
         super(name, BANK_ACCOUNT_INTEREST_RATE);
     }