Added device inteface and first device RadioPlayer

Geraete.config

@@ -0,0 +1,3 @@
+CD=device.CdPlayer
+Radio=device.RadioPlayer
+USB=device.UsbPlayer

src/main/java/Dog.java

@@ -1,10 +0,0 @@
-public class Dog {
-    private String name;
-    private Float weight;
-
-    public Dog(String name, double weight) {
-
-    }
-
-
-}

src/main/java/device/Device.java

@@ -0,0 +1,14 @@
+package device;
+
+public interface Device {
+
+	void louder();
+	void quiter();
+	int getVolume();
+	void next();
+	void prev();
+	String getInfoText();
+	String[] getOptions();
+	void chooseOption(String opt);
+	String play();
+	}

src/main/java/device/RadioPlayer.java

@@ -0,0 +1,48 @@
+package device;
+
+public class RadioPlayer implements Device {
+    @Override
+    public void louder() {
+
+    }
+
+    @Override
+    public void quiter() {
+
+    }
+
+    @Override
+    public int getVolume() {
+        return 0;
+    }
+
+    @Override
+    public void next() {
+
+    }
+
+    @Override
+    public void prev() {
+
+    }
+
+    @Override
+    public String getInfoText() {
+        return null;
+    }
+
+    @Override
+    public String[] getOptions() {
+        return new String[0];
+    }
+
+    @Override
+    public void chooseOption(String opt) {
+
+    }
+
+    @Override
+    public String play() {
+        return null;
+    }
+}

src/test/java/DogTest.java

@@ -1,15 +0,0 @@
-import org.junit.jupiter.api.Test;
-import static org.assertj.core.api.Assertions.*;
-
-class DogTest {
-
-    Dog fido = new Dog("Fido", 5.25);
-
-    Dog fidosClone = new Dog("Fido", 5.25);
-
-    @Test
-    void test() {
-        assertThat(fido).isEqualToComparingFieldByFieldRecursively(fidosClone);
-    }
-
-}

src/test/java/device/RadioPlayerTest.java

@@ -0,0 +1,44 @@
+package device;
+
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+class RadioPlayerTest {
+
+    @Test
+    void louder() {
+    }
+
+    @Test
+    void quiter() {
+    }
+
+    @Test
+    void getVolume() {
+    }
+
+    @Test
+    void next() {
+    }
+
+    @Test
+    void prev() {
+    }
+
+    @Test
+    void getInfoText() {
+    }
+
+    @Test
+    void getOptions() {
+    }
+
+    @Test
+    void chooseOption() {
+    }
+
+    @Test
+    void play() {
+    }
+}