I created a new blank custom master page in SharePoint designer 2010. Made it the default page and now when I open the website in browser it shows error:

```
Error
An unexpected error has occured
Correlation ID: 44eccc...................

```

What is the minimum code that must be present in master page to make it work? I thought since I am creating it from SPD then it will take care of it but looks like that's not the case.