writing own event for Reservation creation BUS object

I am trying to create a workflow that should get triggered when a new reservation is created for approval. I am using the BOR object for material reservation but it does not contain an event of creation. I wish to create a new event and then add code to the event so that a mail to an approver can be sent. Using the approval received I need to confirm the reservation else render it cancelled.

I require help in creating the event and writing the event code for it.

Thanks for taking time to go through my query

Zankruti Parikh