diff --git a/src/app/classes/album.spec.ts b/src/app/classes/album.spec.ts
new file mode 100644
index 0000000..5456017
--- /dev/null
+++ b/src/app/classes/album.spec.ts
@@ -0,0 +1,7 @@
+import { Album } from './album';
+
+describe('Album', () => {
+  it('should create an instance', () => {
+    expect(new Album()).toBeTruthy();
+  });
+});
diff --git a/src/app/classes/album.ts b/src/app/classes/album.ts
new file mode 100644
index 0000000..c272f54
--- /dev/null
+++ b/src/app/classes/album.ts
@@ -0,0 +1,2 @@
+export class Album {
+}
diff --git a/src/app/classes/artist.spec.ts b/src/app/classes/artist.spec.ts
new file mode 100644
index 0000000..5c78ac3
--- /dev/null
+++ b/src/app/classes/artist.spec.ts
@@ -0,0 +1,7 @@
+import { Artist } from './artist';
+
+describe('Artist', () => {
+  it('should create an instance', () => {
+    expect(new Artist()).toBeTruthy();
+  });
+});
diff --git a/src/app/classes/artist.ts b/src/app/classes/artist.ts
new file mode 100644
index 0000000..1060425
--- /dev/null
+++ b/src/app/classes/artist.ts
@@ -0,0 +1,2 @@
+export class Artist {
+}
diff --git a/src/app/classes/song.spec.ts b/src/app/classes/song.spec.ts
new file mode 100644
index 0000000..99612bb
--- /dev/null
+++ b/src/app/classes/song.spec.ts
@@ -0,0 +1,7 @@
+import { Song } from './song';
+
+describe('Song', () => {
+  it('should create an instance', () => {
+    expect(new Song()).toBeTruthy();
+  });
+});
diff --git a/src/app/classes/song.ts b/src/app/classes/song.ts
new file mode 100644
index 0000000..d87a3f3
--- /dev/null
+++ b/src/app/classes/song.ts
@@ -0,0 +1,2 @@
+export class Song {
+}