annotate return values of IndexableSetContributor.getAdditionalRootsToIndex as @NotNull

diff --git a/xml/impl/src/com/intellij/javaee/ExternalResourcesRootsProvider.java b/xml/impl/src/com/intellij/javaee/ExternalResourcesRootsProvider.java
index 795feb38fec3ceaeca9560afa3db92d6a06c651d..e5eb057f136b6446cd5d879ebabd021a7e9fd889 100644 (file)
--- a/xml/impl/src/com/intellij/javaee/ExternalResourcesRootsProvider.java
+++ b/xml/impl/src/com/intellij/javaee/ExternalResourcesRootsProvider.java
@@ -56,6 +56,7 @@ public class ExternalResourcesRootsProvider extends IndexableSetContributor {
     }
   };
 
+  @NotNull
   @Override
   public Set<VirtualFile> getAdditionalRootsToIndex() {
     Set<VirtualFile> roots = new THashSet<VirtualFile>();