* #1569 DTO pattern implemented using Enums

* #1569 DTO pattern implemented using Enums

* #1569 adding some java docs

* #1569 some changes in java doc and code style

* #1569 some changes in java doc and code style

* #1569 some changes in java doc and code style

* #1569 some changes in java doc and code style

* #1569 adding suggested extra line

* #1569 license added to pom.xml

* #1569 more checkstyle problems resolved

* #1569 more checkstyle problems resolved

* #1569 more checkstyle problems resolved
Co-authored-by: Nsiavashsoleymani <siavash.soleimani@snapp.cab>
Co-authored-by: NSubhrodip Mohanta <subhrodipmohanta@gmail.com>