diff --git a/src/main/java/org/example/model/GasCar.java b/src/main/java/org/example/model/GasCar.java
index 223ff06..0195d7d 100644
--- a/src/main/java/org/example/model/GasCar.java
+++ b/src/main/java/org/example/model/GasCar.java
@@ -30,4 +30,6 @@ public class GasCar extends Car {
     // TODO: Implement refuel(double amount)
     // Validate amount
     // Cap at 100
+
+    // TODO: Override showDetails()
 }
diff --git a/src/main/java/org/example/model/Vehicle.java b/src/main/java/org/example/model/Vehicle.java
index 1a2f7e4..10cd28e 100644
--- a/src/main/java/org/example/model/Vehicle.java
+++ b/src/main/java/org/example/model/Vehicle.java
@@ -35,4 +35,6 @@ public abstract class Vehicle {
                         " | Energy: " + getEnergyType()
         );
     }
+
+    public abstract void showDetails();
 }