Tweaks suggested in code review

Author: joshheald

Modules/Sources/Storage/GRDB/GRDBManager.swift

@@ -9,7 +9,7 @@ public protocol GRDBDatabaseConnection: DatabaseReader & DatabaseWriter {}
 
 public final class GRDBManager: GRDBManagerProtocol {
 
-    public var databaseConnection: GRDBDatabaseConnection
+    public let databaseConnection: GRDBDatabaseConnection
 
     public init(databasePath: String) throws {
         let databaseURL = URL(fileURLWithPath: databasePath)

WooCommerce/Classes/ServiceLocator/ServiceLocator.swift

@@ -205,7 +205,12 @@ final class ServiceLocator {
 
         guard let grdbManager = _grdbManager else {
             do {
-                let documentsPath = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
+                guard let documentsPath = FileManager.default.urls(
+                    for: .documentDirectory,
+                    in: .userDomainMask).first else {
+                    fatalError("Failed to get the path to the documents directory.")
+                }
+
                 let databasePath = documentsPath.appendingPathComponent(WooConstants.localSQLiteDatabaseName).path
                 let manager = try GRDBManager(databasePath: databasePath)
                 DDLogInfo("Started GRDBManager with database path: \(databasePath)")

WooCommerce/Classes/System/WooConstants.swift

@@ -15,7 +15,7 @@ public enum WooConstants {
 
     /// Local SQLite Database Name
     ///
-    static let localSQLiteDatabaseName = "woo-local.db"
+    static let localSQLiteDatabaseName = "woo-local.sqlite"
 
     /// Keychain Access's Service Name
     ///