Create: Main.java

Create: Main.java, Address.java

Create: Main.java

Create: PasswordChecker.java, Main.java

Create: Main.java, Logger.java, SimpleLogger.java, SmartLogger.java

Create: Main.java, SimpleAccount.java, CreditAccount.java, Account.java

Create: TaxSystem.java, Tax1.java, Tax2.java, Main.java, Company.java, Deal.java, Expenditure.java, Sale.java