I get the an exception when trying to serialize a very simple object using Jackson. The error:

> 
> org.codehaus.jackson.map.JsonMappingException: No serializer found for
>  class MyPackage.TestA and no properties
>  discovered to create BeanSerializer (to avoid exception, disable
>  SerializationConfig.Feature.FAIL\_ON\_EMPTY\_BEANS) )
> 
> 
> 

Below is the simple class and code to serialize. 

Can anyone tell my why I get this error?

```
public class TestA {
    String SomeString = "asd";
}

TestA testA = new TestA();
ObjectMapper om = new ObjectMapper();
try {
    String testAString = om.writeValueAsString(testA); // error here!

    TestA newTestA = om.readValue(testAString, TestA.class);
} catch (JsonGenerationException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (JsonMappingException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
} catch (IOException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}

```