diff --git a/platform/core-api/src/com/intellij/codeInsight/FileModificationService.java b/platform/core-api/src/com/intellij/codeInsight/FileModificationService.java
index 680ea24d09fa..f10d55c71fa9 100644
--- a/platform/core-api/src/com/intellij/codeInsight/FileModificationService.java
+++ b/platform/core-api/src/com/intellij/codeInsight/FileModificationService.java
@@ -16,6 +16,8 @@
 package com.intellij.codeInsight;
 
 import com.intellij.openapi.components.ServiceManager;
+import com.intellij.openapi.project.Project;
+import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiElement;
 import com.intellij.psi.PsiFile;
 import org.jetbrains.annotations.NotNull;
@@ -40,4 +42,6 @@ public abstract class FileModificationService {
   public boolean preparePsiElementsForWrite(@NotNull PsiElement... elements) {
     return preparePsiElementsForWrite(Arrays.asList(elements));
   }
+
+  public abstract boolean prepareVirtualFilesForWrite(@NotNull Project project, @NotNull Collection<VirtualFile> files);
 }
diff --git a/platform/lang-impl/src/com/intellij/codeInsight/CodeInsightUtilBase.java b/platform/lang-impl/src/com/intellij/codeInsight/CodeInsightUtilBase.java
index 3c430fa47973..f788b0478a33 100644
--- a/platform/lang-impl/src/com/intellij/codeInsight/CodeInsightUtilBase.java
+++ b/platform/lang-impl/src/com/intellij/codeInsight/CodeInsightUtilBase.java
@@ -100,6 +100,12 @@ public class CodeInsightUtilBase extends CodeInsightUtilCore {
     return true;
   }
 
+  @Override
+  public boolean prepareVirtualFilesForWrite(@NotNull Project project, @NotNull Collection<VirtualFile> files) {
+    ReadonlyStatusHandler.OperationStatus status = ReadonlyStatusHandler.getInstance(project).ensureFilesWritable(files);
+    return !status.hasReadonlyFiles();
+  }
+
   // returns true on success
   public static boolean prepareEditorForWrite(@NotNull Editor editor) {
     if (!editor.isViewer()) return true;