Added implementation of methods
Added implemenetation of methods and comments
Conflicts resolved
Added implementation of methods
Added comments to interface methods
Added implementation of methods
Added implementation of method
Testing success
Coding style corrected
Merge pull request #6 from bolek117/kzielinski

Kzielinski
Merge remote-tracking branch 'origin' into kzielinski
Merge remote-tracking branch 'origin' into kzielinski
Merge pull request #7 from bolek117/kzielinski

Kzielinski
Merge conflicts resolved
Merge conflicts resolved part 2
Merge conflicts resolved