Added a helper class to aid in file access for converter

The file converter will need various access abilities to the
dataset text files for conversion. It will also require write
abilities to create the database generation files.

The new helper file is a class that holds such functionailty
for data access and write abilities.
Added selection methods to helper files

The helper file initially was not indended to have access
methods to individual lines or line selection ranges. However,
now that it is apparant not all data from the dataset can be
extracted and converted in one batch, the data will need to be split.
The helper file will now help here also.
The getSelectedLine() and getSelectionLines() have now been added to
the FileHelper class.
Minor typos corrected, commenting and assertions added to helper class

There existed some typos regarding types. These were corrected.
Commenting was added.
TODO tasks were added.
Assertions to assure correct behaviour were added to methods.
All changes happened within the fileHelper class.
Add come rename and create methods

Additional methods deemed usefule or necesary were added
to the FileHelper class.
fileExists method implemented and tested working, helper files added

fileExists method has been implemented. In future will need to
add multi parameter method to point to this once concatinating path and
filename.

Helper files were also added to aid in accessing and querying both DBMS.
Added new helper file methods

Added querySQL and queryCypher methods to db helper classes
for easy access later.
Fix line counter in helper file

Line counter in file helper file had an error where lines were always
counted to one regardless of the real number of lines in the text
file.
It now has been fixed to correctly reflect the number of lines.