Working HandleArray.getItFromFile(filename);
TODO File Design Validation before calling .getItFromFile()
getDataFromFile(File):InputDataType WORKING OK.

TODO

outputToFile(File,InputDataType) (BufferedWriter ISSUE !! first )
(the following inside outputToFile)
-check if Data.array (not empty)
-check if Data.option available in Sorting options (1..4)
-error messages where needed
-add to file every output, even if not valid data, mentioning corresponding issues