[kronolith] How to refuse overlapped events for some calendars ?

[Patrick Abiven]

Hello
We have dedicated some calendars as 'resource calendars' (for meeting room, vehicule, ...).
And for these calendars we would like to refuse 'overlapped events'.
What are your advises for implementing this ? Should we create a specific driver for this type of calendars and check the start-end time before saving the new event ? 
Regards
Patrick