I recently build a cupboard out of scrap-wood and the doors did not fully close by themselves, so I designed this simple clip for a double door. You simply have to push the tab and the door unlocks.
Easily push doors back into lock.

Note: 
The doors have to be under a bit of tension for best results.

Needed Hardware: 
2xM3 screw (length according to wood-thickness)

Printing:
I do recommend printing on the side (as last picture) for better oriented layers, this should increase longevity significantly.

• 0.2mm layerhight should be sufficient
• supports needed when printing on the side
• durable filament recommended (I used PLA+)