i got a requirement on lucene index on java

I need to do index based on given keywords,like i need to search based on keywords,

suppose,i have 100 keywords and 1000 files any format,if any file contains keywords from 100 keywords ,i need to index that files only.

i knew in regain has start-words-list and white list for keyword index,but lucene i dont know whether that facility is there or not

please try to solve my problem as soon as possible,waiting for replay

Thank you;