For interfaces and abstract methods it is generally a good practice to add a @return annotation even if it is just @return void or @return null, so that implementors know what to do in the overridden method.
For interface and abstract methods, it is impossible to infer the return type
from the immediate code. In these cases, it is generally advisible to explicitly
annotate these methods with a @return doc comment to communicate to implementors
of these methods what they are expected to return.
You can fix this by adding a namespace to your class:
When choosing a vendor namespace, try to pick something that is not too generic to avoid conflicts with other libraries.