Improve transformation printer documentation.

Signed-off-by: Rami Ylimäki <rami.ylimaki@vincit.fi>
Fix documentation of renaming class.

Signed-off-by: Rami Ylimäki <rami.ylimaki@vincit.fi>
Improve error reporter documentation.

Signed-off-by: Rami Ylimäki <rami.ylimaki@vincit.fi>
Document name generator class.

Signed-off-by: Rami Ylimäki <rami.ylimaki@vincit.fi>