Creating and accessing Custome table through End routine

Hello

In my requirement, around 30 company codes are there and based on country i have to access them in end routine. Code is working correctly but it is becoming very lengthy code. Is there any other way like maitaining entries in custome table with 0CALMONTH, 0COMP_CODE and 0COUNTRY and accessing them in End-routine.

Kindly suggest.

Thanks

Anuja