Disable sqlite database on android from being able to be read

I'm using the SQLite database on android and because of privacy issues I want to disable the database from being read. I use chmod -R 777 /data/data/... to retrieve the database file myself.

I noticed that some apps (like youtube) have a database file which I can't download via the Android Device Monitor, how would I achieve such a thing for my own database?

When trying to download the databases the following message occurs:

[2015-04-09 13:43:08] Failed to pull selection
[2015-04-09 13:43:08] null