diff --git a/.idea/libraries/gradle_and_groovy_plugin.xml b/.idea/libraries/gradle_and_groovy_plugin.xml
index d572bda634f..67935164c19 100644
--- a/.idea/libraries/gradle_and_groovy_plugin.xml
+++ b/.idea/libraries/gradle_and_groovy_plugin.xml
@@ -1,5 +1,8 @@
 <component name="libraryTable">
   <library name="gradle-and-groovy-plugin">
+    <ANNOTATIONS>
+      <root url="file://$PROJECT_DIR$/annotations" />
+    </ANNOTATIONS>
     <CLASSES>
       <root url="file://$PROJECT_DIR$/ideaSDK/plugins/gradle/lib" />
       <root url="file://$PROJECT_DIR$/ideaSDK/plugins/Groovy/lib" />
diff --git a/.idea/libraries/guava.xml b/.idea/libraries/guava.xml
index 7ee52aa2d3c..0ce1514c56d 100644
--- a/.idea/libraries/guava.xml
+++ b/.idea/libraries/guava.xml
@@ -1,5 +1,8 @@
 <component name="libraryTable">
   <library name="guava">
+    <ANNOTATIONS>
+      <root url="file://$PROJECT_DIR$/annotations" />
+    </ANNOTATIONS>
     <CLASSES>
       <root url="jar://$PROJECT_DIR$/ideaSDK/lib/guava-14.0.1.jar!/" />
     </CLASSES>
diff --git a/annotations/com/google/common/collect/annotations.xml b/annotations/com/google/common/collect/annotations.xml
new file mode 100644
index 00000000000..feadffd5917
--- /dev/null
+++ b/annotations/com/google/common/collect/annotations.xml
@@ -0,0 +1,5 @@
+<root>
+  <item name='com.google.common.collect.Multimap java.util.Set&lt;K&gt; keySet()'>
+    <annotation name='org.jetbrains.annotations.NotNull'/>
+  </item>
+</root>
\ No newline at end of file