Collaboration - Rooms - Extensions points problem

Hallo,

I'd like to perform my own code when an event of adding meeting appointment in room occur. I found document: Room Extension Developer Guide (https://media.sdn.sap.com/html/submitted_docs/nw_kmc/howto/coll/Room%20Extension%20Developer%20Guide.html). This document describes developing extensions. Extensions is service which is performed when some special event occur. There is 19 possible extensions points describing this events. But there is no suitable for creating meeting appointment for room. Is this possible with extensions mechanism? Or is there another way?

Best regards,

Josef Motl