diff --git a/src/com/dd/FoldingConfigurable.kt b/src/com/dd/FoldingConfigurable.kt
deleted file mode 100755
index 443a21b..0000000
--- a/src/com/dd/FoldingConfigurable.kt
+++ /dev/null
@@ -1,72 +0,0 @@
-/*
- * IdeaVim - Vim emulator for IDEs based on the IntelliJ platform
- * Copyright (C) 2003-2014 The IdeaVim authors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-package com.dd
-
-import com.intellij.openapi.options.Configurable
-import com.intellij.openapi.options.ConfigurationException
-import org.jetbrains.annotations.Nls
-import javax.swing.JComponent
-import javax.swing.JPanel
-import javax.swing.JTextField
-
-/**
- * @author skyrylyuk
- */
-class FoldingConfigurable : Configurable {
-
-
-    private val mPanel = JPanel()
-    private val mHolderName = JTextField()
-    private val mPrefix: JTextField? = null
-
-    @Nls
-    override fun getDisplayName(): String {
-        return "Android Folding"
-    }
-
-    override fun getHelpTopic(): String? {
-        return null
-    }
-
-    override fun createComponent(): JComponent? {
-        reset()
-        mHolderName.text = "Hello"
-        mPanel.add(mHolderName)
-        return mPanel
-    }
-
-    override fun isModified(): Boolean {
-        return true
-    }
-
-    @Throws(ConfigurationException::class)
-    override fun apply() {
-        //    PropertiesComponent.getInstance().setValue(PREFIX, mPrefix.getText());
-        //    PropertiesComponent.getInstance().setValue(VIEWHOLDER_CLASS_NAME, mHolderName.getText());
-    }
-
-    override fun reset() {
-        //    mPrefix.setText(Utils.getPrefix());
-        //    mHolderName.setText(Utils.getViewHolderClassName());
-    }
-
-    override fun disposeUIResources() {
-
-    }
-}
diff --git a/src/com/dd/FoldingNode.java b/src/com/dd/FoldingNode.java
new file mode 100644
index 0000000..f72c52c
--- /dev/null
+++ b/src/com/dd/FoldingNode.java
@@ -0,0 +1,23 @@
+package com.dd;
+
+import com.intellij.ide.projectView.PresentationData;
+import com.intellij.ide.projectView.ViewSettings;
+import com.intellij.ide.projectView.impl.nodes.PsiFileNode;
+import com.intellij.openapi.project.Project;
+import com.intellij.psi.PsiFile;
+
+class FoldingNode extends PsiFileNode {
+    private String mName;
+
+    public FoldingNode(Project project, PsiFile value, ViewSettings viewSettings, String shortName) {
+        super(project, value, viewSettings);
+        mName = shortName;
+    }
+
+    @Override
+    protected void updateImpl(PresentationData presentationData) {
+        super.updateImpl(presentationData);
+
+        presentationData.setPresentableText(mName);
+    }
+}
diff --git a/src/com/dd/FoldingNode.kt b/src/com/dd/FoldingNode.kt
deleted file mode 100644
index 02c3070..0000000
--- a/src/com/dd/FoldingNode.kt
+++ /dev/null
@@ -1,17 +0,0 @@
-package com.dd
-
-import com.intellij.ide.projectView.PresentationData
-import com.intellij.ide.projectView.ViewSettings
-import com.intellij.ide.projectView.impl.nodes.PsiFileNode
-import com.intellij.openapi.project.Project
-import com.intellij.psi.PsiFile
-
-class FoldingNode(project: Project, value: PsiFile, viewSettings: ViewSettings, private val mName: String) : PsiFileNode(project, value, viewSettings) {
-
-    override fun update(presentationData: PresentationData) {
-        super.update(presentationData)
-
-
-        presentationData.presentableText = mName
-    }
-}
diff --git a/src/com/dd/SettingConfigurable.java b/src/com/dd/SettingConfigurable.java
index 214fb05..ea300d2 100644
--- a/src/com/dd/SettingConfigurable.java
+++ b/src/com/dd/SettingConfigurable.java
@@ -96,9 +96,9 @@ public boolean isModified() {
 
     @Override
     public void apply() throws ConfigurationException {
-        PropertiesComponent.getInstance().setValue(PREFIX_CUSTOM_USE, useCustomPatternCheckBox.isSelected());
+        PropertiesComponent.getInstance().setValue(PREFIX_CUSTOM_USE, Boolean.valueOf(useCustomPatternCheckBox.isSelected()).toString());
         PropertiesComponent.getInstance().setValue(PREFIX_PATTERN, customPattern.getText());
-        PropertiesComponent.getInstance().setValue(PREFIX_HIDE, hideFoldingPrefix.isSelected());
+        PropertiesComponent.getInstance().setValue(PREFIX_HIDE, Boolean.valueOf(hideFoldingPrefix.isSelected()).toString());
 
         isModified = false;
     }
@@ -108,7 +108,7 @@ public void reset() {
         final boolean customPrefix = PropertiesComponent.getInstance().getBoolean(PREFIX_CUSTOM_USE, false);
         useCustomPatternCheckBox.setSelected(customPrefix);
         customPattern.setEnabled(customPrefix);
-        customPattern.setText(PropertiesComponent.getInstance().getValue(PREFIX_PATTERN));
+        customPattern.setText(PropertiesComponent.getInstance().getValue(PREFIX_PATTERN, DEFAULT_PATTERN_DOUBLE));
         hideFoldingPrefix.getModel().setSelected(PropertiesComponent.getInstance().getBoolean(PREFIX_HIDE, false));
     }