diff --git a/AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903226/Net1414080903226DBHelper.java b/AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903226/Net1414080903226DBHelper.java
new file mode 100644
index 00000000..015834c0
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+++ b/AndroidLabs/app/src/main/java/edu/hzuapps/androidlabs/homeworks/net1414080903226/Net1414080903226DBHelper.java
@@ -0,0 +1,84 @@
+package edu.hzuapps.androidlabs.homeworks.net1414080903226;
+
+import android.content.Context;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+public class Net1414080903226DBHelper extends SQLiteOpenHelper {
+    public static final int DATABASE_VERSION = 13;
+    public static final String DATABASE_NAME = "database.db";
+    public static final String TABLE_BLOCK = "block";
+    public static final String TABLE_SAVE = "save";
+    public static final String TABLE_SEED = "seed";
+    public static final String TABLE_STEVE = "steve";
+
+    public static final String SAVE_PREFIX = "world_";
+
+    private static final String SQL_CREATE_BLOCK =
+            "CREATE TABLE " + TABLE_BLOCK + " (" +
+                    "chunkX INTEGER," +
+                    "chunkY INTEGER," +
+                    "chunkZ INTEGER," +
+                    "blockX INTEGER," +
+                    "blockY INTEGER," +
+                    "blockZ INTEGER," +
+                    "blockType INTEGER," +
+                    "PRIMARY KEY(blockX, blockY, blockZ));";
+
+    private static final String SQL_CREATE_SEED =
+            "CREATE TABLE " + TABLE_SEED + " (" +
+                    "seed INTEGER PRIMARY KEY);";
+
+    private static final String SQL_CREATE_SAVE =
+            "CREATE TABLE " + TABLE_SAVE + " (" +
+                    "id INTEGER PRIMARY KEY AUTOINCREMENT," +
+                    "name TEXT," +
+                    "seed INTEGER," +
+                    "date TEXT," +
+                    "x INTEGER," +
+                    "y INTEGER," +
+                    "z INTEGER);";
+
+    private static final String SQL_CREATE_STEVE =
+            "CREATE TABLE " + TABLE_STEVE + " (" +
+                    "x INTEGER," +
+                    "y INTEGER," +
+                    "z INTEGER," +
+                    "PRIMARY KEY(x, y, z));";
+
+    public static final String SQL_DROP_TABLE =
+            "DROP TABLE IF EXISTS ";
+
+    private static Net1414080903226DBHelper instance = null;
+
+    private static Context context = null;
+
+    public static void setContext(Context c){
+        context = c;
+    }
+
+    public synchronized static Net1414080903226DBHelper getInstance(){
+        if (instance == null) {
+            instance = new Net1414080903226DBHelper(context);
+        }
+        return instance;
+    }
+
+    private Net1414080903226DBHelper(Context context){
+        super(context, DATABASE_NAME, null, DATABASE_VERSION);
+    }
+
+    public void onCreate(SQLiteDatabase db){
+        db.execSQL(SQL_CREATE_BLOCK);
+        db.execSQL(SQL_CREATE_SEED);
+        db.execSQL(SQL_CREATE_SAVE);
+        db.execSQL(SQL_CREATE_STEVE);
+    }
+
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion){
+        db.execSQL(SQL_DROP_TABLE + TABLE_BLOCK);
+        db.execSQL(SQL_DROP_TABLE + TABLE_SEED);
+        db.execSQL(SQL_DROP_TABLE + TABLE_SAVE);
+        db.execSQL(SQL_DROP_TABLE + TABLE_STEVE);
+        onCreate(db);
+    }
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