refactor to use exception helper factories

src/maxicode/decoder/decoded_bit_stream_parser.rs

@@ -86,7 +86,7 @@ pub fn decode(bytes: &[u8], mode: u8) -> Result<DecoderRXingResult, Exceptions>
                 let pc = getPostCode2(bytes);
                 let ps2Length = getPostCode2Length(bytes) as usize;
                 if ps2Length > 10 {
-                    return Err(Exceptions::FormatException(None));
+                    return Err(Exceptions::formatEmpty());
                 }
                 // NumberFormat df = new DecimalFormat("0000000000".substring(0, ps2Length));
                 // postcode = df.format(pc);