Takes text file and build suffix tree for frequently quering word index. If word hasn't found - return null. Has case sensitive and insesnsitive methods for index search.
WORKS ONLY WITH UTF-8 ENCODING.
Has jUnit tests, that compare results with results from dummy word count.
There are 2 WordIndex realisation and was discovered that concurrency classes are good here only on very big file. To run test just print in terminal from WI/ directory command 'mvn clean install' and tests will be executed.
@author Morenkov E.V.