diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/api/Controller.java b/app/src/main/java/ru/volgorobot/vrcatalog/api/Controller.java
index 3a1654a..383d4fc 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/api/Controller.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/api/Controller.java
@@ -1,8 +1,5 @@
 package ru.volgorobot.vrcatalog.api;
 
-import android.content.Context;
-import android.widget.Toast;
-
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/FirstLevelNodeViewBinder.java b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/FirstLevelNodeViewBinder.java
index 78b6495..846dbd5 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/FirstLevelNodeViewBinder.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/FirstLevelNodeViewBinder.java
@@ -1,23 +1,16 @@
 package ru.volgorobot.vrcatalog.nodeViewBinders;
 
 import android.content.Context;
-import android.os.AsyncTask;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;
 
-import java.util.ArrayList;
-
 import me.texy.treeview.TreeNode;
 import me.texy.treeview.base.BaseNodeViewBinder;
 import ru.volgorobot.vrcatalog.MainContract;
 import ru.volgorobot.vrcatalog.R;
 import ru.volgorobot.vrcatalog.ViewBinderPresenter;
-import ru.volgorobot.vrcatalog.additional.NetworkErrorException;
-import ru.volgorobot.vrcatalog.additional.ResultWithErrorCode;
-import ru.volgorobot.vrcatalog.model.CoreModel;
 import ru.volgorobot.vrcatalog.model.FirstLevelModel;
-import ru.volgorobot.vrcatalog.model.SecondLevelModel;
 
 public class FirstLevelNodeViewBinder extends BaseNodeViewBinder implements MainContract.ViewBinder {
     TextView textView;
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/SecondLevelNodeViewBinder.java b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/SecondLevelNodeViewBinder.java
index fb561bb..d719cc5 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/SecondLevelNodeViewBinder.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/SecondLevelNodeViewBinder.java
@@ -1,23 +1,17 @@
 package ru.volgorobot.vrcatalog.nodeViewBinders;
 
 import android.content.Context;
-import android.os.AsyncTask;
 import android.view.View;
 import android.widget.ImageView;
 import android.widget.TextView;
 
-import java.util.ArrayList;
-
 import me.texy.treeview.TreeNode;
 import me.texy.treeview.base.BaseNodeViewBinder;
 import ru.volgorobot.vrcatalog.MainContract;
 import ru.volgorobot.vrcatalog.R;
 import ru.volgorobot.vrcatalog.ViewBinderPresenter;
-import ru.volgorobot.vrcatalog.additional.NetworkErrorException;
-import ru.volgorobot.vrcatalog.additional.ResultWithErrorCode;
 import ru.volgorobot.vrcatalog.model.CoreModel;
 import ru.volgorobot.vrcatalog.model.SecondLevelModel;
-import ru.volgorobot.vrcatalog.model.ThirdLevelModel;
 
 public class SecondLevelNodeViewBinder extends BaseNodeViewBinder implements MainContract.ViewBinder {
     TextView textView;
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/ThirdLevelNodeViewBinder.java b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/ThirdLevelNodeViewBinder.java
index 1545d46..07ba470 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/ThirdLevelNodeViewBinder.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/nodeViewBinders/ThirdLevelNodeViewBinder.java
@@ -1,24 +1,16 @@
 package ru.volgorobot.vrcatalog.nodeViewBinders;
 
 import android.content.Context;
-import android.content.Intent;
-import android.os.AsyncTask;
 import android.view.View;
 import android.widget.TextView;
 
-import java.util.ArrayList;
-
 import me.texy.treeview.TreeNode;
 import me.texy.treeview.base.BaseNodeViewBinder;
 import ru.volgorobot.vrcatalog.MainContract;
 import ru.volgorobot.vrcatalog.R;
 import ru.volgorobot.vrcatalog.ViewBinderPresenter;
-import ru.volgorobot.vrcatalog.additional.NetworkErrorException;
-import ru.volgorobot.vrcatalog.additional.ResultWithErrorCode;
 import ru.volgorobot.vrcatalog.model.CoreModel;
-import ru.volgorobot.vrcatalog.model.DetailModel;
 import ru.volgorobot.vrcatalog.model.ThirdLevelModel;
-import ru.volgorobot.vrcatalog.view.DetailActivity;
 
 public class ThirdLevelNodeViewBinder extends BaseNodeViewBinder implements MainContract.ViewBinder {
     TextView textView;
@@ -27,7 +19,7 @@ public class ThirdLevelNodeViewBinder extends BaseNodeViewBinder implements Main
     public ThirdLevelNodeViewBinder(View itemView, Context context, MainContract.MainActivityView mView, CoreModel coreModel) {
         super(itemView);
         viewBinderPresenter = new ViewBinderPresenter(mView, coreModel, this, context);
-        textView = (TextView) itemView.findViewById(R.id.node_name_view);
+        textView = itemView.findViewById(R.id.node_name_view);
     }
 
     @Override
diff --git a/app/src/main/java/ru/volgorobot/vrcatalog/view/DetailActivity.java b/app/src/main/java/ru/volgorobot/vrcatalog/view/DetailActivity.java
index b478d3b..8af69ba 100644
--- a/app/src/main/java/ru/volgorobot/vrcatalog/view/DetailActivity.java
+++ b/app/src/main/java/ru/volgorobot/vrcatalog/view/DetailActivity.java
@@ -1,15 +1,14 @@
 package ru.volgorobot.vrcatalog.view;
 
 import android.content.Intent;
-import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
+import android.support.v7.app.AppCompatActivity;
 import android.text.method.LinkMovementMethod;
 import android.view.MenuItem;
 import android.widget.EditText;
 import android.widget.TextView;
 
 import java.util.HashMap;
-import java.util.Map;
 
 import ru.volgorobot.vrcatalog.R;