diff --git a/src/plugins/diffeditor/diffeditor.cpp b/src/plugins/diffeditor/diffeditor.cpp
index 357fbdc2d85..1e612752371 100644
--- a/src/plugins/diffeditor/diffeditor.cpp
+++ b/src/plugins/diffeditor/diffeditor.cpp
@@ -193,9 +193,8 @@ void DescriptionEditorWidget::handleCurrentContents()
 
 ///////////////////////////////// DiffEditor //////////////////////////////////
 
-DiffEditor::DiffEditor()
-    : IEditor(0)
-    , m_document(new DiffEditorDocument())
+DiffEditor::DiffEditor(const QSharedPointer<DiffEditorDocument> &doc)
+    : m_document(doc)
     , m_descriptionWidget(0)
     , m_stackedWidget(0)
     , m_sideBySideEditor(0)
@@ -208,30 +207,6 @@ DiffEditor::DiffEditor()
     , m_toggleDescriptionAction(0)
     , m_reloadAction(0)
     , m_diffEditorSwitcher(0)
-{
-    ctor();
-}
-
-DiffEditor::DiffEditor(DiffEditor *other)
-    : IEditor(0)
-    , m_document(other->m_document)
-    , m_descriptionWidget(0)
-    , m_stackedWidget(0)
-    , m_sideBySideEditor(0)
-    , m_unifiedEditor(0)
-    , m_currentEditor(0)
-    , m_controller(0)
-    , m_guiController(0)
-    , m_toolBar(0)
-    , m_entriesComboBox(0)
-    , m_toggleDescriptionAction(0)
-    , m_reloadAction(0)
-    , m_diffEditorSwitcher(0)
-{
-    ctor();
-}
-
-void DiffEditor::ctor()
 {
     setDuplicateSupported(true);
 
@@ -303,7 +278,7 @@ DiffEditor::~DiffEditor()
 
 Core::IEditor *DiffEditor::duplicate()
 {
-    return new DiffEditor(this);
+    return new DiffEditor(m_document);
 }
 
 bool DiffEditor::open(QString *errorString,
diff --git a/src/plugins/diffeditor/diffeditor.h b/src/plugins/diffeditor/diffeditor.h
index 8be9cb1a81e..66a045305a9 100644
--- a/src/plugins/diffeditor/diffeditor.h
+++ b/src/plugins/diffeditor/diffeditor.h
@@ -55,10 +55,10 @@ class UnifiedDiffEditorWidget;
 class DIFFEDITOR_EXPORT DiffEditor : public Core::IEditor
 {
     Q_OBJECT
+
 public:
-    DiffEditor();
-    DiffEditor(DiffEditor *other);
-    virtual ~DiffEditor();
+    DiffEditor(const QSharedPointer<DiffEditorDocument> &doc);
+    ~DiffEditor();
 
 public:
     DiffEditorController *controller() const;
@@ -86,7 +86,6 @@ private slots:
     void slotDiffEditorSwitched();
 
 private:
-    void ctor();
     void updateEntryToolTip();
     void showDiffEditor(QWidget *newEditor);
     void updateDiffEditorSwitcher();
diff --git a/src/plugins/diffeditor/diffeditorfactory.cpp b/src/plugins/diffeditor/diffeditorfactory.cpp
index b0b23b2771b..874d0e72950 100644
--- a/src/plugins/diffeditor/diffeditorfactory.cpp
+++ b/src/plugins/diffeditor/diffeditorfactory.cpp
@@ -29,6 +29,7 @@
 
 #include "diffeditor.h"
 #include "diffeditorconstants.h"
+#include "diffeditordocument.h"
 #include "diffeditorfactory.h"
 #include "sidebysidediffeditorwidget.h"
 
@@ -48,7 +49,7 @@ DiffEditorFactory::DiffEditorFactory(QObject *parent)
 
 Core::IEditor *DiffEditorFactory::createEditor()
 {
-    return new DiffEditor();
+    return new DiffEditor(QSharedPointer<DiffEditorDocument>(new DiffEditorDocument));
 }
 
 } // namespace Internal