this.setFossilFuelType(newfossilFuelType);
this.setFossilFuelType(FuelType .valueOf(FuelType.class, operand)); } catch (IllegalArgumentException e) {
this.setFossilFuelType(newfossilFuelType);
this.setFossilFuelType(FuelType .valueOf(FuelType.class, operand)); } catch (IllegalArgumentException e) {