separate features to submodules

src/browser/db.rs

@@ -5,13 +5,19 @@ pub struct Browser {
 }
 
 impl Browser {
+    // Construct new browser DB (connection)
+    pub fn new(connection: Arc<sqlite::Connection>) -> Browser {
+        let this = Self { connection };
+        this.init();
+        this
+    }
+
+    // Create browser table in DB if not exist yet
     fn init(&self) {}
+
+    // Save active browser session to DB
     fn save(&self) {}
+
+    // Restore previous browser session from DB
     fn restore(&self) {}
 }
-
-pub fn new(connection: Arc<sqlite::Connection>) -> Browser {
-    let this = Browser { connection };
-    this.init();
-    this
-}