code: public static Object setEL(Object o, int index, Object value) {
  	try {
  	    return set(o, index, value);
  	}
  	catch (ArrayUtilException e) {
  	    return null;
  	}
      }
docs: sets a value to a array at defined index
  
  @param o
  @param index
  @param value
  @return value setted