SimpleFeatureTypeBuilder typeBuilder = new SimpleFeatureTypeBuilder();
typeBuilder.setName("badatts");
AttributeTypeBuilder attBuilder = new AttributeTypeBuilder();
attBuilder.setBinding(String.class);
typeBuilder.add(attBuilder.buildDescriptor("123_number_first"));
attBuilder.setBinding(String.class);
typeBuilder.add(attBuilder.buildDescriptor("i has spaces"));
SimpleFeatureType badatts = typeBuilder.buildFeatureType();
badatts = FeatureDataConverter.DEFAULT.convertType(badatts, null, null, null);