diff --git a/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/ModuleEditor.java b/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/ModuleEditor.java
index 1920f1c0c7ee..25157244abb3 100644
--- a/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/ModuleEditor.java
+++ b/java/idea-ui/src/com/intellij/openapi/roots/ui/configuration/ModuleEditor.java
@@ -16,7 +16,6 @@ import com.intellij.openapi.options.ConfigurationException;
 import com.intellij.openapi.options.ModuleConfigurableEP;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.roots.*;
-import com.intellij.openapi.roots.impl.ModuleRootManagerImpl;
 import com.intellij.openapi.roots.impl.libraries.LibraryEx;
 import com.intellij.openapi.roots.impl.libraries.LibraryTableBase;
 import com.intellij.openapi.roots.libraries.Library;
@@ -128,7 +127,7 @@ public abstract class ModuleEditor implements Place.Navigator, Disposable {
     if (myModifiableRootModel == null) {
       final Module module = getModule();
       if (module != null) {
-        myModifiableRootModel = ((ModuleRootManagerImpl)ModuleRootManager.getInstance(module)).getModifiableModel(new UIRootConfigurationAccessor(myProject));
+        myModifiableRootModel = ModuleRootManagerEx.getInstanceEx(module).getModifiableModel(new UIRootConfigurationAccessor(myProject));
       }
     }
     return myModifiableRootModel;
diff --git a/platform/projectModel-impl/src/com/intellij/openapi/roots/ModuleRootManagerEx.java b/platform/projectModel-impl/src/com/intellij/openapi/roots/ModuleRootManagerEx.java
new file mode 100644
index 000000000000..34fec42e6285
--- /dev/null
+++ b/platform/projectModel-impl/src/com/intellij/openapi/roots/ModuleRootManagerEx.java
@@ -0,0 +1,16 @@
+// Copyright 2000-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package com.intellij.openapi.roots;
+
+import com.intellij.openapi.module.Module;
+import com.intellij.openapi.roots.impl.RootConfigurationAccessor;
+import org.jetbrains.annotations.NotNull;
+
+public abstract class ModuleRootManagerEx extends ModuleRootManager {
+
+  @NotNull
+  public abstract ModifiableRootModel getModifiableModel(@NotNull RootConfigurationAccessor accessor);
+
+  public static ModuleRootManagerEx getInstanceEx(@NotNull Module module) {
+    return (ModuleRootManagerEx) module.getComponent(ModuleRootManager.class);
+  }
+}
diff --git a/platform/projectModel-impl/src/com/intellij/openapi/roots/impl/ModuleRootManagerImpl.java b/platform/projectModel-impl/src/com/intellij/openapi/roots/impl/ModuleRootManagerImpl.java
index d71cce3c51ca..98aa40abce24 100644
--- a/platform/projectModel-impl/src/com/intellij/openapi/roots/impl/ModuleRootManagerImpl.java
+++ b/platform/projectModel-impl/src/com/intellij/openapi/roots/impl/ModuleRootManagerImpl.java
@@ -32,7 +32,7 @@ import org.jetbrains.jps.model.module.JpsModuleSourceRootType;
 
 import java.util.*;
 
-public class ModuleRootManagerImpl extends ModuleRootManager implements Disposable {
+public class ModuleRootManagerImpl extends ModuleRootManagerEx implements Disposable {
   protected static final Logger LOG = Logger.getInstance("#com.intellij.openapi.roots.impl.ModuleRootManagerImpl");
 
   private final Module myModule;
@@ -96,6 +96,7 @@ public class ModuleRootManagerImpl extends ModuleRootManager implements Disposab
     return getModifiableModel(new RootConfigurationAccessor());
   }
 
+  @Override
   @NotNull
   public ModifiableRootModel getModifiableModel(@NotNull RootConfigurationAccessor accessor) {
     ApplicationManager.getApplication().assertReadAccessAllowed();