Could not resolve type in @extends tag

[Question on StackOverflow](http://stackoverflow.com/questions/36103312/closure-compiler-could-not-resolve-type-in-extends-tag)

There is a warning when I compile this code using interfaces

``` js
/**
* @interface
* @extends {IReused}
*/
function IRegistration() {
}

/**
* @interface
*/
function IInitializable() {
}

/**
* @param {IReused} initializer
*/
IInitializable.prototype.initializedBy = function (initializer) { };

/**
* @interface
* @extends {IOwned}
*/
function IReused() {
}

/**
* @interface
*/
function IOwned() {
}
```

But when I change all interfaces to classes everything just works.

``` js
/**
* @constructor
* @extends {IReused}
*/
function IRegistration() {
}

/**
* @constructor
*/
function IInitializable() {
}

/**
* @param {IReused} initializer
*/
IInitializable.prototype.initializedBy = function (initializer) { };

/**
* @constructor
* @extends {IOwned}
*/
function IReused() {
}

/**
* @constructor
*/
function IOwned() {
}
```

Also when using interfaces when I remove the `IReused` parameter from the `initializedBy` function everything works as expected.

I've also noticed that if I change the order of the interfaces the compiler does not output a warning

``` js
/**
* @interface
*/
function IOwned() {
}

/**
* @interface
* @extends {IOwned}
*/
function IReused() {
}

/**
* @interface
* @extends {IReused}
*/
function IRegistration() {
}

/**
* @interface
*/
function IInitializable() {
}

/**
* @param {IReused} initializer
*/
IInitializable.prototype.initializedBy = function (initializer) { };
```