diff --git a/platform/lang-impl/src/com/intellij/openapi/diff/impl/settings/DiffPreviewPanel.java b/platform/lang-impl/src/com/intellij/openapi/diff/impl/settings/DiffPreviewPanel.java
index 4cf6390f19c0..0b0632aa8fdf 100644
--- a/platform/lang-impl/src/com/intellij/openapi/diff/impl/settings/DiffPreviewPanel.java
+++ b/platform/lang-impl/src/com/intellij/openapi/diff/impl/settings/DiffPreviewPanel.java
@@ -18,7 +18,6 @@ package com.intellij.openapi.diff.impl.settings;
 
 import com.intellij.application.options.colors.ColorAndFontSettingsListener;
 import com.intellij.application.options.colors.PreviewPanel;
-import com.intellij.diff.DiffContentFactory;
 import com.intellij.diff.DiffContext;
 import com.intellij.diff.contents.DiffContent;
 import com.intellij.diff.requests.ContentDiffRequest;
@@ -30,14 +29,12 @@ import com.intellij.diff.util.DiffUtil;
 import com.intellij.diff.util.TextDiffTypeFactory.TextDiffTypeImpl;
 import com.intellij.diff.util.ThreeSide;
 import com.intellij.openapi.diff.DiffBundle;
-import com.intellij.openapi.editor.Document;
 import com.intellij.openapi.editor.Editor;
 import com.intellij.openapi.editor.LogicalPosition;
 import com.intellij.openapi.editor.colors.EditorColorsScheme;
 import com.intellij.openapi.editor.event.*;
 import com.intellij.openapi.editor.ex.EditorEx;
 import com.intellij.openapi.editor.ex.util.EditorUtil;
-import com.intellij.openapi.fileTypes.FileType;
 import com.intellij.openapi.project.Project;
 import com.intellij.openapi.util.Disposer;
 import com.intellij.ui.IdeBorderFactory;
@@ -112,12 +109,6 @@ class DiffPreviewPanel implements PreviewPanel {
       myContents = Arrays.asList(DiffPreviewProvider.getContents());
     }
 
-    private static DiffContent convert(@NotNull com.intellij.openapi.diff.DiffContent content) {
-      Document document = content.getDocument();
-      FileType fileType = content.getContentType();
-      return DiffContentFactory.getInstance().create(null, document, fileType);
-    }
-
     @NotNull
     @Override
     public List<DiffContent> getContents() {
diff --git a/platform/lang-impl/src/com/intellij/openapi/diff/impl/settings/DiffPreviewProvider.java b/platform/lang-impl/src/com/intellij/openapi/diff/impl/settings/DiffPreviewProvider.java
index 6ad6cb479202..f1fe07b82d07 100644
--- a/platform/lang-impl/src/com/intellij/openapi/diff/impl/settings/DiffPreviewProvider.java
+++ b/platform/lang-impl/src/com/intellij/openapi/diff/impl/settings/DiffPreviewProvider.java
@@ -51,9 +51,9 @@ public abstract class DiffPreviewProvider {
                                             @NotNull String right,
                                             @NotNull FileType fileType) {
     return new DiffContent[]{
-      createContent(left, StdFileTypes.JAVA),
-      createContent(center, StdFileTypes.JAVA),
-      createContent(right, StdFileTypes.JAVA)};
+      createContent(left, fileType),
+      createContent(center, fileType),
+      createContent(right, fileType)};
   }
 
   @NotNull