diff --git a/java/java-tests/testSrc/com/intellij/index/IndexTest.groovy b/java/java-tests/testSrc/com/intellij/index/IndexTest.groovy
index 5cf526a20a09..154ce9e653e0 100644
--- a/java/java-tests/testSrc/com/intellij/index/IndexTest.groovy
+++ b/java/java-tests/testSrc/com/intellij/index/IndexTest.groovy
@@ -574,7 +574,7 @@ class IndexTest extends JavaCodeInsightFixtureTestCase {
       FileBasedIndex.instance.
         processValues(IdIndex.NAME, new IdIndexEntry("Foo", true), null, new FileBasedIndex.ValueProcessor<Integer>() {
           @Override
-          boolean process(VirtualFile file, Integer value) {
+          boolean process(@NotNull VirtualFile file, Integer value) {
             foundId[0] = true
             FileBasedIndex.instance.processValues(
               StubUpdatingIndex.INDEX_ID,
@@ -582,7 +582,7 @@ class IndexTest extends JavaCodeInsightFixtureTestCase {
               null,
               new FileBasedIndex.ValueProcessor<SerializedStubTree>() {
                 @Override
-                boolean process(VirtualFile file2, SerializedStubTree value2) {
+                boolean process(@NotNull VirtualFile file2, SerializedStubTree value2) {
                   foundStub[0] = true
                   return true
                 }
diff --git a/platform/indexing-impl/src/com/intellij/psi/impl/cache/impl/IndexCacheManagerImpl.java b/platform/indexing-impl/src/com/intellij/psi/impl/cache/impl/IndexCacheManagerImpl.java
index 2e3ca149a496..80d71032816e 100644
--- a/platform/indexing-impl/src/com/intellij/psi/impl/cache/impl/IndexCacheManagerImpl.java
+++ b/platform/indexing-impl/src/com/intellij/psi/impl/cache/impl/IndexCacheManagerImpl.java
@@ -98,7 +98,7 @@ public class IndexCacheManagerImpl implements CacheManager{
           final FileIndexFacade index = FileIndexFacade.getInstance(myProject);
 
           @Override
-          public boolean process(final VirtualFile file, final Integer value) {
+          public boolean process(@NotNull final VirtualFile file, final Integer value) {
             ProgressIndicatorProvider.checkCanceled();
             final int mask = value.intValue();
             if ((mask & occurrenceMask) != 0 && index.shouldBeFound(scope, file)) {
diff --git a/plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/XsltSymbolIndex.java b/plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/XsltSymbolIndex.java
index c34099e425e1..139e2ef90f70 100644
--- a/plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/XsltSymbolIndex.java
+++ b/plugins/xpath/xpath-lang/src/org/intellij/lang/xpath/xslt/impl/XsltSymbolIndex.java
@@ -213,7 +213,7 @@ public class XsltSymbolIndex extends FileBasedIndexExtension<String, XsltSymbolI
         }
 
         @Override
-        public boolean process(VirtualFile file, Kind kind) {
+        public boolean process(@NotNull VirtualFile file, Kind kind) {
             if (myScope.contains(file)) {
                 final PsiFile psiFile = myMgr.findFile(file);
                 if (psiFile != null && XsltSupport.isXsltFile(psiFile)) {
diff --git a/xml/impl/src/com/intellij/psi/impl/source/xml/DefaultXmlTagNameProvider.java b/xml/impl/src/com/intellij/psi/impl/source/xml/DefaultXmlTagNameProvider.java
index ca2e69387bdc..d79df580ea98 100644
--- a/xml/impl/src/com/intellij/psi/impl/source/xml/DefaultXmlTagNameProvider.java
+++ b/xml/impl/src/com/intellij/psi/impl/source/xml/DefaultXmlTagNameProvider.java
@@ -131,7 +131,7 @@ public class DefaultXmlTagNameProvider implements XmlTagNameProvider {
       if (ns.startsWith("file://")) continue;
       fbi.processValues(XmlNamespaceIndex.NAME, ns, null, new FileBasedIndex.ValueProcessor<XsdNamespaceBuilder>() {
         @Override
-        public boolean process(final VirtualFile file, XsdNamespaceBuilder value) {
+        public boolean process(@NotNull final VirtualFile file, XsdNamespaceBuilder value) {
           List<String> tags = value.getRootTags();
           for (String s : tags) {
             elements.add(LookupElementBuilder.create(s).withTypeText(ns).withInsertHandler(new XmlTagInsertHandler() {