dummy isr for unused interrupts

Hello together,

I'm using the XC866-Board from Infineon.
As I don't use all the availible interrupts in my program I would like to simply overwrite the NOPs of the interrupt vectors with RETIs to make sure the program does not accidentaly run into my code when an unused interrupt should occure.
Is there a simpler alternative than writing a interrupt service routine for every unused interrupt like

void dummyISR() interrupt xy
{
}