it is not possible to do that. create stored programs and call from file.

create procedure proc1 is
begin
-- 
end;

create procedure proc2 is
begin
--
end;

file 1:

declare
proc1_exception exception
begin
   begin 
      proc1;
   exception
    when others then
       raise proc1_exception;
    end;

proc2;

exception
   when proc1_exception then
     dbms_output.put_line('exception raised while executing proc1'); 
  when others then
   dbms_output.put_line('exception raised while executing proc2');
end;

dont write any exception handlers in proc1