package SubscribedSubredditDatabase; import android.arch.persistence.room.Database; import android.arch.persistence.room.Room; import android.arch.persistence.room.RoomDatabase; import android.content.Context; @Database(entities = {SubscribedSubredditData.class}, version = 1) public abstract class SubscribedSubredditRoomDatabase extends RoomDatabase { private static SubscribedSubredditRoomDatabase INSTANCE; public abstract SubscribedSubredditDao subscribedSubredditDao(); public static SubscribedSubredditRoomDatabase getDatabase(final Context context) { if(INSTANCE == null) { synchronized (SubscribedSubredditRoomDatabase.class) { if(INSTANCE == null) { INSTANCE = Room.databaseBuilder(context.getApplicationContext(), SubscribedSubredditRoomDatabase.class, "subscribed_subreddits") .build(); } } } return INSTANCE; } }