How to submit BM25 scoring library to Lucene

[Yuval Feinstein]

Hi.
I would like to submit a BM25 scoring library to Lucene under contrib.
The library is a modification of Joaquin Perez Iglesias' work described at the 
link below:
http://nlp.uned.es/~jperezi/Lucene-BM25/
a. Do I need a Jira issue for this?
b. I have explain() methods inside some Scorers. I know they are deprecated 
under Lucene 2.9.1.
Do I need to erase them?
TIA,
Yuval Feinstein