I have a class ManageUser as below:

```
public class ManageUser {
private static UserBO gUserBO = new UserBO();

 public String method1() {

    gUserBO.callSomeFunction();

    gUserBO.callSomeOtherFunction();

  }
}

```

Now, I have a test class where I want to test method1() and since the methods callSomeFunction() and callSomeOtherFunction() end up making database calls I want to mock the calls to those methods. I am unable to do that by using mock since the object in ManageUser is static. How do I proceed? I am new to Junit and Mockito and can't seem to find relevant answers.