public ConvertManager() {
register(BigDecimal.class, new BigDecimalConverter());
register(BigInteger.class, new BigIntegerConverter());
register(Boolean.class, new BooleanConverter());
register(Byte.class, new ByteConverter());
register(Character.class, new CharacterConverter());
register(Double.class, new DoubleConverter());
register(Float.class, new FloatConverter());
register(Integer.class, new IntegerConverter());
register(Long.class, new LongConverter());
register(Short.class, new ShortConverter());