Citation: "I was wondering why the french military did not send fighters to intercept the aircraft as he didn't declare emergency nor sqwaked 7700."
Assuming a 'normal' peactime alert state (10 minutes to airborne) it would be impossible to 'scramble' to an event which reportedly lasted 8 minutes.
I think it was said a while back that fighters airborne in the nearby training area (which is probably the cause of the 'bend' in the track between BCN and DUS) were diverted to the scene (and apparently reached it pretty quickly).