Android pre-populated database (installation method)

MyDatabaseHelper.kt

package com.example.example

// ...
import java.io.File
import java.io.FileOutputStream

class ActsDbHelper(val context: Context) : SQLiteOpenHelper(context, DATABASE_NAME, null, DATABASE_VERSION) {

    private fun installDatabaseFromAssets() {
        val inputStream = context.assets.open("$ASSETS_PATH/$DATABASE_NAME.sqlite3")

        try {
            val outputFile = File(context.getDatabasePath(DATABASE_NAME).path)
            val outputStream = FileOutputStream(outputFile)

            inputStream.copyTo(outputStream)
            inputStream.close()

            outputStream.flush()
            outputStream.close()
        } catch (exception: Throwable) {
            throw RuntimeException("The $DATABASE_NAME database couldn't be installed.", exception)
        }
    }

    override fun onCreate(db: SQLiteDatabase?) {
        // Nothing to do
    }

    override fun onUpgrade(db: SQLiteDatabase?, oldVersion: Int, newVersion: Int) {
        // Nothing to do
    }

    companion object {
        const val ASSETS_PATH = "databases"
        // ...
    }

}