cleanup

platform/core-impl/src/com/intellij/psi/impl/source/resolve/FileContextUtil.java

@@ -32,7 +32,7 @@ public class FileContextUtil {
   private FileContextUtil() { }
 
   @Nullable
-  public static PsiElement getFileContext(PsiFile file) {
+  public static PsiElement getFileContext(@NotNull PsiFile file) {
     SmartPsiElementPointer pointer = file.getUserData(INJECTED_IN_ELEMENT);
     return pointer == null ? null : pointer.getElement();
   }

platform/lang-impl/src/com/intellij/openapi/roots/impl/OrderRootsEnumeratorImpl.java

@@ -146,6 +146,7 @@ public class OrderRootsEnumeratorImpl implements OrderRootsEnumerator {
     return result;
   }
 
+  @NotNull
   private Collection<String> computeRootsUrls() {
     final Collection<String> result = new LinkedHashSet<String>();
     myOrderEnumerator.forEach(new Processor<OrderEntry>() {