Refactoring Sum class in model package
Refactoring Transpose class in model package
Refactoring User class in model package
Refactoring Profile class in model package
Refactoring DataBaseDAO class in model package
Refactoring CalculusDAO and ProfileDAO class in model package
Refactoring UserDAO class in model package
Refactoring Subtract class in model package
Refactoring Multiply class in model package