Manage opening database

This allows us to only specify a path in the constructor.

package.json

@@ -17,6 +17,7 @@
 	},
 	"homepage": "https://github.com/Snooful/SQLite-Storage#readme",
 	"dependencies": {
-		"@snooful/settings-base": "^1.0.1"
+		"@snooful/settings-base": "^1.0.1",
+		"sqlite": "^3.0.0"
 	}
-}
+}

settings.js

@@ -1,22 +1,31 @@
 const base = require("@snooful/settings-base");
+const sqlite = require("sqlite");
 
 /**
  * Manages settings.
  */
 class SQLiteSettingsManager extends base.BaseSettingsManager {
 	/**
-	 * @param {SQLiteDatabase} database The database to store settings in.
+	 * @param {string} databasePath The path to the database to store settings in.
 	 */
-	constructor(database) {
-		this.database = database;
-		this.init();
+	constructor(databasePath) {
+		super();
 
 		/**
 		 * The settings cache.
 		 */
 		this.settings = {};
 
 		this.setStatement = null;
+
+		// Open the database and init
+		sqlite.open(databasePath).then(database => {
+			base.debug("opened settings database");
+
+			this.database = database;
+			this.init();
+		});
+
 	}
 
 	/**