diff --git a/idea/src/org/jetbrains/jet/plugin/actions/JavaToKotlinAction.java b/idea/src/org/jetbrains/jet/plugin/actions/JavaToKotlinAction.java
index 4938f17bd05..77f81f95e5f 100644
--- a/idea/src/org/jetbrains/jet/plugin/actions/JavaToKotlinAction.java
+++ b/idea/src/org/jetbrains/jet/plugin/actions/JavaToKotlinAction.java
@@ -22,7 +22,6 @@ import com.intellij.openapi.actionSystem.CommonDataKeys;
 import com.intellij.openapi.command.CommandProcessor;
 import com.intellij.openapi.fileEditor.FileEditorManager;
 import com.intellij.openapi.project.Project;
-import com.intellij.openapi.ui.Messages;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiJavaFile;
 import org.jetbrains.annotations.NotNull;
@@ -33,13 +32,11 @@ import org.jetbrains.jet.plugin.j2k.J2kPostProcessor;
 
 import java.util.List;
 
-import static com.intellij.openapi.ui.Messages.NO;
-import static com.intellij.openapi.ui.Messages.YES;
 import static org.jetbrains.jet.plugin.actions.JavaToKotlinActionUtil.*;
 
 public class JavaToKotlinAction extends AnAction {
     @Override
-    public void actionPerformed(AnActionEvent e) {
+    public void actionPerformed(@NotNull AnActionEvent e) {
         VirtualFile[] virtualFiles = e.getData(CommonDataKeys.VIRTUAL_FILE_ARRAY);
         assert virtualFiles != null;
         final Project project = CommonDataKeys.PROJECT.getData(e.getDataContext());
@@ -48,10 +45,6 @@ public class JavaToKotlinAction extends AnAction {
         if (selectedJavaFiles.isEmpty()) {
             return;
         }
-        final DialogResult userResponse = showDialog(project);
-        if (userResponse == DialogResult.CANCEL) {
-            return;
-        }
 
         final Converter converter = Converter.OBJECT$.create(project,
                                                              ConverterSettings.defaultSettings,
@@ -64,12 +57,7 @@ public class JavaToKotlinAction extends AnAction {
                     @Override
                     public void run() {
                         List<VirtualFile> newFiles = convertFiles(converter, selectedJavaFiles);
-                        if (userResponse == DialogResult.DELETE_FILES) {
-                            deleteFiles(selectedJavaFiles);
-                        }
-                        else if (userResponse == DialogResult.BACKUP_FILES) {
-                            renameFiles(selectedJavaFiles);
-                        }
+                        deleteFiles(selectedJavaFiles);
                         reformatFiles(newFiles, project);
                         for (VirtualFile vf : newFiles) {
                             FileEditorManager.getInstance(project).openFile(vf, true);
@@ -81,30 +69,8 @@ public class JavaToKotlinAction extends AnAction {
         );
     }
 
-    private static enum DialogResult {
-        BACKUP_FILES,
-        DELETE_FILES,
-        CANCEL
-    }
-
-    @NotNull
-    private static DialogResult showDialog(@NotNull Project project) {
-        int result = Messages.showYesNoCancelDialog(project,
-                                                    "Would you like to backup Java files?",
-                                                    "Convert Java to Kotlin",
-                                                    Messages.getQuestionIcon());
-        switch (result) {
-            case YES:
-                return DialogResult.BACKUP_FILES;
-            case NO:
-                return DialogResult.DELETE_FILES;
-            default:
-                return DialogResult.CANCEL;
-        }
-    }
-
     @Override
-    public void update(AnActionEvent e) {
+    public void update(@NotNull AnActionEvent e) {
         boolean enabled = e.getData(CommonDataKeys.VIRTUAL_FILE_ARRAY) != null;
         e.getPresentation().setVisible(enabled);
         e.getPresentation().setEnabled(enabled);
diff --git a/idea/src/org/jetbrains/jet/plugin/actions/JavaToKotlinActionUtil.java b/idea/src/org/jetbrains/jet/plugin/actions/JavaToKotlinActionUtil.java
index cea5232dc94..4a848965605 100644
--- a/idea/src/org/jetbrains/jet/plugin/actions/JavaToKotlinActionUtil.java
+++ b/idea/src/org/jetbrains/jet/plugin/actions/JavaToKotlinActionUtil.java
@@ -137,25 +137,4 @@ public class JavaToKotlinActionUtil {
         }
         return null;
     }
-
-    static void renameFiles(@NotNull List<PsiJavaFile> psiFiles) {
-        for (final PsiFile psiFile : psiFiles) {
-            ApplicationManager.getApplication().runWriteAction(new Runnable() {
-                @Override
-                public void run() {
-                    try {
-                        PsiManager manager = psiFile.getManager();
-                        VirtualFile vFile = psiFile.getVirtualFile();
-                        if (vFile != null) {
-                            vFile.copy(manager, vFile.getParent(), vFile.getNameWithoutExtension() + ".java.old");
-                            vFile.delete(manager);
-                        }
-                    }
-                    catch (IOException e) {
-                        MessagesEx.error(psiFile.getProject(), e.getMessage()).showLater();
-                    }
-                }
-            });
-        }
-    }
 }