My java code is just like below:

public void check()throws  MissingParamException{
    ......
}
public static void main(){
    PrintWriter out = response.getWriter();
    try {
        check();
    } catch (MissingParamException e) {
        // TODO Auto-generated catch block
        out.println("message:"+e.getMessage());
        e.printStackTrace();
        out.close();
    }finally{
        out.close();
    }
    //out.close();
}

Then, my confusion is: what the difference if I put out.close() in a finally code block or if I just remove finally code block and put out.close() behind catch clause (which has been commented in the code). I know that in both ways, the out.close() will be executed because I know that whether the exception happened, the code behind the catch clause will always be executed.