diff --git a/src/main/java/core/basesyntax/MainApp.java b/src/main/java/core/basesyntax/MainApp.java
index f99e9a019..1da187017 100644
--- a/src/main/java/core/basesyntax/MainApp.java
+++ b/src/main/java/core/basesyntax/MainApp.java
@@ -1,5 +1,21 @@
 package core.basesyntax;
 
+import core.basesyntax.vehicle.Bulldozer;
+import core.basesyntax.vehicle.Excavator;
+import core.basesyntax.vehicle.Machine;
+import core.basesyntax.vehicle.Truck;
+
 public class MainApp {
+    public static void main(String[] args) {
+        Machine truck = new Truck();
+        Machine bulldozer = new Bulldozer();
+        Machine excavator = new Excavator();
+
+        Machine[] machines = new Machine[] {truck, bulldozer, excavator};
 
+        for (Machine machine : machines) {
+            machine.doWork();
+            machine.stopWork();
+        }
+    }
 }
diff --git a/src/main/java/core/basesyntax/vehicle/Bulldozer.java b/src/main/java/core/basesyntax/vehicle/Bulldozer.java
new file mode 100644
index 000000000..23622306d
--- /dev/null
+++ b/src/main/java/core/basesyntax/vehicle/Bulldozer.java
@@ -0,0 +1,13 @@
+package core.basesyntax.vehicle;
+
+public class Bulldozer extends Machine {
+    @Override
+    public void doWork() {
+        System.out.println("Bulldozer started its work");
+    }
+
+    @Override
+    public void stopWork() {
+        System.out.println("Bulldozer stopped its work");
+    }
+}
diff --git a/src/main/java/core/basesyntax/vehicle/Excavator.java b/src/main/java/core/basesyntax/vehicle/Excavator.java
new file mode 100644
index 000000000..1e9744744
--- /dev/null
+++ b/src/main/java/core/basesyntax/vehicle/Excavator.java
@@ -0,0 +1,13 @@
+package core.basesyntax.vehicle;
+
+public class Excavator extends Machine {
+    @Override
+    public void doWork() {
+        System.out.println("Excavator started its work");
+    }
+
+    @Override
+    public void stopWork() {
+        System.out.println("Excavator stopped its work");
+    }
+}
diff --git a/src/main/java/core/basesyntax/vehicle/Machine.java b/src/main/java/core/basesyntax/vehicle/Machine.java
new file mode 100644
index 000000000..0bd68df93
--- /dev/null
+++ b/src/main/java/core/basesyntax/vehicle/Machine.java
@@ -0,0 +1,7 @@
+package core.basesyntax.vehicle;
+
+public abstract class Machine {
+    public abstract void doWork();
+
+    public abstract void stopWork();
+}
diff --git a/src/main/java/core/basesyntax/vehicle/Truck.java b/src/main/java/core/basesyntax/vehicle/Truck.java
new file mode 100644
index 000000000..619dc714d
--- /dev/null
+++ b/src/main/java/core/basesyntax/vehicle/Truck.java
@@ -0,0 +1,13 @@
+package core.basesyntax.vehicle;
+
+public class Truck extends Machine {
+    @Override
+    public void doWork() {
+        System.out.println("Truck started its work");
+    }
+
+    @Override
+    public void stopWork() {
+        System.out.println("Truck stopped its work");
+    }
+}