Move several classes to other packages.

app/src/main/java/SubscribedUserDatabase/SubscribedUserDao.java

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+package SubscribedUserDatabase;
+
+import android.arch.lifecycle.LiveData;
+import android.arch.persistence.room.Dao;
+import android.arch.persistence.room.Insert;
+import android.arch.persistence.room.OnConflictStrategy;
+import android.arch.persistence.room.Query;
+
+import java.util.List;
+
+@Dao
+public interface SubscribedUserDao {
+    @Insert(onConflict = OnConflictStrategy.REPLACE)
+    void insert(SubscribedUserData subscribedUserData);
+
+    @Query("DELETE FROM subscribed_users")
+    void deleteAllSubscribedUsers();
+
+    @Query("SELECT * from subscribed_users ORDER BY name COLLATE NOCASE ASC")
+    LiveData<List<SubscribedUserData>> getAllSubscribedUsers();
+}

app/src/main/java/SubscribedUserDatabase/SubscribedUserData.java

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+package SubscribedUserDatabase;
+
+import android.arch.persistence.room.ColumnInfo;
+import android.arch.persistence.room.Entity;
+import android.arch.persistence.room.PrimaryKey;
+import android.support.annotation.NonNull;
+
+@Entity(tableName = "subscribed_users")
+public class SubscribedUserData {
+    @PrimaryKey
+    @NonNull
+    @ColumnInfo(name = "id")
+    private String id;
+    @ColumnInfo(name = "name")
+    private String name;
+    @ColumnInfo(name = "icon")
+    private String iconUrl;
+
+    public SubscribedUserData(@NonNull String id, String name, String iconUrl) {
+        this.id = id;
+        this.name = name;
+        this.iconUrl = iconUrl;
+    }
+
+    @NonNull
+    public String getId() {
+        return id;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getIconUrl() {
+        return iconUrl;
+    }
+}

app/src/main/java/SubscribedUserDatabase/SubscribedUserRepository.java

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+package SubscribedUserDatabase;
+
+import android.app.Application;
+import android.arch.lifecycle.LiveData;
+import android.os.AsyncTask;
+
+import java.util.List;
+
+public class SubscribedUserRepository {
+    private SubscribedUserDao mSubscribedUserDao;
+    private LiveData<List<SubscribedUserData>> mAllSubscribedUsers;
+
+    SubscribedUserRepository(Application application) {
+        SubscribedUserRoomDatabase db = SubscribedUserRoomDatabase.getDatabase(application);
+        mSubscribedUserDao = db.subscribedUserDao();
+        mAllSubscribedUsers = mSubscribedUserDao.getAllSubscribedUsers();
+    }
+
+    LiveData<List<SubscribedUserData>> getAllSubscribedSubreddits() {
+        return mAllSubscribedUsers;
+    }
+
+    public void insert(SubscribedUserData subscribedUserData) {
+        new SubscribedUserRepository.insertAsyncTask(mSubscribedUserDao).execute(subscribedUserData);
+    }
+
+    private static class insertAsyncTask extends AsyncTask<SubscribedUserData, Void, Void> {
+
+        private SubscribedUserDao mAsyncTaskDao;
+
+        insertAsyncTask(SubscribedUserDao dao) {
+            mAsyncTaskDao = dao;
+        }
+
+        @Override
+        protected Void doInBackground(final SubscribedUserData... params) {
+            mAsyncTaskDao.insert(params[0]);
+            return null;
+        }
+    }
+}

app/src/main/java/SubscribedUserDatabase/SubscribedUserRoomDatabase.java

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+package SubscribedUserDatabase;
+
+import android.arch.persistence.room.Database;
+import android.arch.persistence.room.Room;
+import android.arch.persistence.room.RoomDatabase;
+import android.content.Context;
+
+@Database(entities = {SubscribedUserData.class}, version = 1)
+public abstract class SubscribedUserRoomDatabase extends RoomDatabase {
+    private static SubscribedUserRoomDatabase INSTANCE;
+
+    public abstract SubscribedUserDao subscribedUserDao();
+
+    public static SubscribedUserRoomDatabase getDatabase(final Context context) {
+        if(INSTANCE == null) {
+            synchronized (SubscribedUserRoomDatabase.class) {
+                if(INSTANCE == null) {
+                    INSTANCE = Room.databaseBuilder(context.getApplicationContext(),
+                            SubscribedUserRoomDatabase.class, "subscribed_users")
+                            .build();
+                }
+            }
+        }
+        return INSTANCE;
+    }
+}

app/src/main/java/SubscribedUserDatabase/SubscribedUserViewModel.java

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+package SubscribedUserDatabase;
+
+import android.app.Application;
+import android.arch.lifecycle.AndroidViewModel;
+import android.arch.lifecycle.LiveData;
+
+import java.util.List;
+
+public class SubscribedUserViewModel extends AndroidViewModel {
+    private SubscribedUserRepository mSubscribedUserRepository;
+    private LiveData<List<SubscribedUserData>> mAllSubscribedUsers;
+
+    public SubscribedUserViewModel(Application application) {
+        super(application);
+        mSubscribedUserRepository = new SubscribedUserRepository(application);
+        mAllSubscribedUsers = mSubscribedUserRepository.getAllSubscribedSubreddits();
+    }
+
+    public LiveData<List<SubscribedUserData>> getAllSubscribedUsers() {
+        return mAllSubscribedUsers;
+    }
+
+    public void insert(SubscribedUserData subscribedUserData) {
+        mSubscribedUserRepository.insert(subscribedUserData);
+    }
+}