diff --git a/src/music_kraken/database/database.py b/src/music_kraken/database/database.py
index 32ea67a..928237e 100644
--- a/src/music_kraken/database/database.py
+++ b/src/music_kraken/database/database.py
@@ -7,7 +7,11 @@ from pkg_resources import resource_string
 
 from .song import (
     Song,
-    Lyrics
+    Lyrics,
+    Metadata,
+    Target,
+    Artist,
+    Source
 )
 from .get_song import get_song_from_response
 from ..utils.shared import (
@@ -285,31 +289,40 @@ WHERE '{track_id}' == id;
         self.cursor.execute(query, (file, path, genre))
         self.connection.commit()
 
+    def write_target(self, song_id: str, target: Target):
+        query = f"UPDATE track SET file = ?, path = ? WHERE '{song_id}' == id;"
+        self.cursor.execute(query, (target.file, target.path))
+        self.connection.commit()
+
+    def write_artist(self, artist: Artist, song_id: str = None, release_group_id: str = None):
+        artist_id = artist.id
+
+        query = "INSERT OR REPLACE INTO artist (id, mb_id, name) VALUES (?, ?, ?);"
+        self.cursor.execute(query, (artist_id, artist.mb_id, artist.name))
+        self.connection.commit()
+
+        if song_id is not None:
+            adjacency_query = "INSERT OR REPLACE INTO artist_track (artist_id, track_id) VALUES (?, ?);"
+            self.cursor.execute(adjacency_query, (artist_id, song_id))
+            self.connection.commit()
+
+        if release_group_id is not None:
+            adjacency_query = "INSERT OR REPLACE INTO artist_release_group (artist_id, release_group_id) VALUES (?, ?);"
+            self.cursor.execute(adjacency_query, (artist_id, release_group_id))
+            self.connection.commit()
+
+    def write_many_artists(self, song_id: str, artist_list: List[Artist]):
+        for artist in artist_list:
+            self.write_artist(song_id=song_id, artist=artist)
+
     def write_song(self, song: Song):
-        pass
+        song_id = song.id
+        
+        # write artists
+        self.write_many_artists(song_id=song_id, artist_list=song.artists)
+        # write target
+        self.write_target(song_id=song_id, target=song.target)
 
     def write_many_song(self, songs: List[Song]):
         for song in songs:
             self.write_song(song=song)
-
-
-if __name__ == "__main__":
-    import tempfile
-
-    temp_folder = "music-downloader"
-    temp_dir = os.path.join(tempfile.gettempdir(), temp_folder)
-    if not os.path.exists(temp_dir):
-        os.mkdir(temp_dir)
-
-    temp_dir = get_temp_dir()
-    DATABASE_FILE = "metadata.db"
-    DATABASE_STRUCTURE_FILE = "database_structure.sql"
-    db_path = os.path.join(TEMP_DIR, DATABASE_FILE)
-
-    logging.basicConfig()
-
-    logger = logging.getLogger("database")
-    logger.setLevel(logging.DEBUG)
-
-    database = Database(os.path.join(temp_dir, "metadata.db"), os.path.join(temp_dir, "database_structure.sql"), logger,
-                        reset_anyways=True)
diff --git a/src/music_kraken/database/get_song.py b/src/music_kraken/database/get_song.py
index c7d46b3..e27d0b1 100644
--- a/src/music_kraken/database/get_song.py
+++ b/src/music_kraken/database/get_song.py
@@ -13,7 +13,7 @@ from .song import (
 
 def get_song_from_response(response: dict) -> Song:
     # artists
-    artists = [Artist(id_=a['id'], name=a['name']) for a in response['artists']]
+    artists = [Artist(id_=a['id'], mb_id=a['id'], name=a['name']) for a in response['artists']]
 
     # metadata
     metadata = Metadata()
@@ -26,12 +26,10 @@ def get_song_from_response(response: dict) -> Song:
     for src in response['source']:
         if src['src'] is None:
             continue
-        sources.append(Source(src))
+        sources.append(Source(src=src['src'], url=src['url']))
 
     # target
-    target = Target()
-    target.set_file(response['file'])
-    target.set_path(response['path'])
+    target = Target(file=response['file'], path=response['path'])
 
     # Lyrics
     lyrics_container = LyricsContainer()
diff --git a/src/music_kraken/database/song.py b/src/music_kraken/database/song.py
index ff12b7c..8d3f72d 100644
--- a/src/music_kraken/database/song.py
+++ b/src/music_kraken/database/song.py
@@ -26,18 +26,19 @@ class Metadata:
         return self.data[item]
 
 
-class Source:
-    def __init__(self, src_data) -> None:
-        self.src_data = src_data
+class Source(DatabaseObject):
+    def __init__(self, id_: str = None, src: str = None, url: str = None) -> None:
+        super().__init__(id_=id_)
 
-        self.src = self.src_data['src']
-        self.url = self.src_data['url']
+        self.src = src
+        self.url = url
 
 
-class Target:
-    def __init__(self) -> None:
-        self._file = None
-        self._path = None
+class Target(DatabaseObject):
+    def __init__(self, id_:str = None, file: str = None, path: str = None) -> None:
+        super().__init__(id_=id_)
+        self._file = file
+        self._path = path
 
     def set_file(self, _file: str):
         self._file = _file
@@ -74,9 +75,10 @@ class Target:
     exists_on_disc = property(fget=get_exists_on_disc)
 
 
-class Artist:
-    def __init__(self, id_: str = None, name: str = None) -> None:
-        self.id = id_
+class Artist(DatabaseObject):
+    def __init__(self, id_: str = None, mb_id: str = None, name: str = None) -> None:
+        super().__init__(id_=id_)
+        self.mb_id = mb_id
         self.name = name
 
     def __eq__(self, __o: object) -> bool:
@@ -88,8 +90,9 @@ class Artist:
         return self.name
 
 
-class Lyrics:
-    def __init__(self, text: str, language: str) -> None:
+class Lyrics(DatabaseObject):
+    def __init__(self, text: str, language: str, id_: str = None) -> None:
+        super().__init__(id_=id_)
         self.text = text
         self.language = language
 
diff --git a/src/music_kraken/static_files/temp_database_structure.sql b/src/music_kraken/static_files/temp_database_structure.sql
index 1fd36d2..31c9c73 100644
--- a/src/music_kraken/static_files/temp_database_structure.sql
+++ b/src/music_kraken/static_files/temp_database_structure.sql
@@ -1,6 +1,7 @@
 DROP TABLE IF EXISTS artist;
 CREATE TABLE artist (
     id TEXT PRIMARY KEY NOT NULL,
+    mb_id TEXT,
     name TEXT
 );