Java. QA. Datasets in tests.

I need to load datasets for bunch of classes in tests.

Those classes pre generated and in theory can be changed at any moment. For now all datasets - json representation of class with filled required fields.

I use generics for that. Mapper example:

public class ResourceMapper<T> {

    private Class<T> classType;

    public ResourceMapper(Class<T> classType) {
        this.classType = classType;
    }

    private T build(String path) {
        InputStream inputStream = this.getClass().getResourceAsStream(path);
        try {
            ObjectMapper objectMapper = new ObjectMapper(new JsonFactory());
            T requiredClass = objectMapper.readValue(inputStream, this.classType);
            inputStream.close();
            return requiredClass ;
        } catch (Exception e) {
            throw new RuntimeException(e.getMessage());
        }
    }

}

Usage example:

ResourceMapper<SomeClass> resourceMapper = new ResourceMapper<>(SomeClass.class);
SomeClass someClass = resourceMapper.build("/someClass.json");

Is my solution good enough?

I have feeling, that is pretty silly.