Cleanup (nullability)

java/idea-ui/src/com/intellij/facet/impl/ui/libraries/FacetLibrariesValidatorImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2009 JetBrains s.r.o.
+ * Copyright 2000-2014 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -72,6 +72,7 @@ public class FacetLibrariesValidatorImpl extends FacetLibrariesValidator {
     onChange();
   }
 
+  @NotNull
   public ValidationResult check() {
     if (myRequiredLibraries == null) {
       return ValidationResult.OK;

java/idea-ui/src/com/intellij/facet/impl/ui/libraries/FrameworkLibraryValidatorImpl.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2013 JetBrains s.r.o.
+ * Copyright 2000-2014 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -27,6 +27,7 @@ import com.intellij.openapi.roots.ui.configuration.libraries.CustomLibraryDescri
 import com.intellij.openapi.roots.ui.configuration.libraries.LibraryPresentationManager;
 import com.intellij.openapi.util.Ref;
 import com.intellij.util.Processor;
+import org.jetbrains.annotations.NotNull;
 
 import javax.swing.*;
 import java.util.Set;
@@ -50,6 +51,7 @@ public class FrameworkLibraryValidatorImpl extends FrameworkLibraryValidator {
     myLibraryCategoryName = libraryCategoryName;
   }
 
+  @NotNull
   @Override
   public ValidationResult check() {
     final Set<? extends LibraryKind> libraryKinds = myLibraryDescription.getSuitableLibraryKinds();

platform/lang-api/src/com/intellij/facet/ui/FacetEditorValidator.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2009 JetBrains s.r.o.
+ * Copyright 2000-2014 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -13,12 +13,14 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package com.intellij.facet.ui;
 
+import org.jetbrains.annotations.NotNull;
+
 /**
  * @author nik
  */
 public abstract class FacetEditorValidator {
+  @NotNull
   public abstract ValidationResult check();
 }

plugins/google-app-engine/source/com/intellij/appengine/facet/AppEngineFacetEditor.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2013 JetBrains s.r.o.
+ * Copyright 2000-2014 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -60,6 +60,7 @@ public class AppEngineFacetEditor extends FacetEditorTab {
     myContext = context;
     mySdkEditor = new AppEngineSdkEditor(myContext.getProject());
     validatorsManager.registerValidator(new FacetEditorValidator() {
+      @NotNull
       @Override
       public ValidationResult check() {
         return AppEngineSdkUtil.checkPath(mySdkEditor.getPath());

python/src/com/jetbrains/python/buildout/BuildoutConfigPanel.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2013 JetBrains s.r.o.
+ * Copyright 2000-2014 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -81,6 +81,7 @@ public class BuildoutConfigPanel extends JPanel {
     myErrorPanel.add(facetErrorPanel.getComponent(), BorderLayout.CENTER);
 
     facetErrorPanel.getValidatorsManager().registerValidator(new FacetEditorValidator() {
+      @NotNull
       @Override
       public ValidationResult check() {
         if (!myFacetEnabled) {

python/src/com/jetbrains/python/configuration/PyIntegratedToolsConfigurable.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2000-2013 JetBrains s.r.o.
+ * Copyright 2000-2014 JetBrains s.r.o.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -120,6 +120,7 @@ public class PyIntegratedToolsConfigurable implements SearchableConfigurable, No
     myErrorPanel.add(facetErrorPanel.getComponent(), BorderLayout.CENTER);
 
     facetErrorPanel.getValidatorsManager().registerValidator(new FacetEditorValidator() {
+      @NotNull
       @Override
       public ValidationResult check() {
         final Sdk sdk = PythonSdkType.findPythonSdk(myModule);