Monitor already running application using my applicaton

Question

Hello Friends,

I want to create an application that monitor other applications. if any of other application throws un-handled exception,
then my application should restart it automatically.

suppose there are already running applications on my system (application A,B,C,D) and my application is (z).
z will keep watch on (A,B,C and D). if any of (A,B,C,D) throws unhandled exception, then z will restart that application.

How can I achieve it.

Note: I don't want to manage database entries. I don't want to manage database for this.

Thanks