Compiling COBOL programs whose program-id are `MAIN` fails

[yutaro-sakamoto]

Compiling the following program fails because duplicated variable are declared in Java programs.
It seems that this error occurs only if the program-id is MAIN.

       IDENTIFICATION          DIVISION.
       PROGRAM-ID.             MAIN.
       ENVIRONMENT             DIVISION.
       CONFIGURATION           SECTION.
       DATA                    DIVISION.
       WORKING-STORAGE SECTION.
       PROCEDURE DIVISION.
       DISPLAY "hello".

./MAIN.java:202: error: variable l_MAIN is already defined in class MAIN
  private final static int l_MAIN = 2;