OPENIG-115 CR-3670 Improve code coverage for CaptureFilter
* Introduced a WriterProvider abstraction to make testing easier (independent of any File system interactions)
* No changes from a configuration file POV

git-svn-id: https://svn.forgerock.org/openig@238 dbb9e58e-28e6-4ce0-90e8-f11d9605b710
Fix license header

git-svn-id: https://svn.forgerock.org/openig@239 dbb9e58e-28e6-4ce0-90e8-f11d9605b710
More encapsulation, improved javadoc
* Introduced setter, made public fields private

git-svn-id: https://svn.forgerock.org/openig@240 dbb9e58e-28e6-4ce0-90e8-f11d9605b710