Complete tests implementation of Arguments class
Remove setters in target class for tests
Fix spacing in annotations
Parameter names should always be set (no default)
Add SuppressWarnings annotation to WordTest class
Fix Parameter comparison and equality

add more unit test to ensure it is OK
Fix length of parameters' names comparison and add unit test for this case
Start implementing the parse method for the Arguments class

Also check if the parameters set already contains a same argument before
adding it.