* BJ-139: Added xml handler
* Added object types, constants moved to other class
* fix constant's modifiers
* Added handler's reuseable, support null-values
* Added xml processor
* Moved constants to other class
* Added some exception handling
* fix
* Added additional description in exception handling
* Fixed after comments
* Removed main method, fixed doc
* Removed error handling in method writeEndElement
* Added throwing runtime exception when init
* Added snapshot-version in poms
* Fixed filter parent pom version