edu.umd.cs.findbugs.annotations
Enums 
Priority
When
Annotation Types 
CheckForNull
CheckReturnValue
DefaultAnnotation
DefaultAnnotationForFields
DefaultAnnotationForMethods
DefaultAnnotationForParameters
NonNull
Nullable
OverrideMustInvoke
PossiblyNull
ReturnValuesAreNonnullByDefault
SuppressWarnings
UnknownNullness