feat: update structure

cs2030s/labs/Lab1/DepartureEvent.java

@@ -0,0 +1,28 @@
+/**
+ * The DepartureEvent is an Event which handles the end of a service.
+ * It handles allocating customers in queue to a counter.
+ * 
+ * @author Yadunand Prem
+ * @version CS2030S AY22/23 Semester 2
+ */
+class DepartureEvent extends Event {
+
+  private Customer customer;
+
+  public DepartureEvent(double time, Customer customer) {
+    super(time);
+    this.customer = customer;
+  }
+
+  @Override
+  public String toString() {
+    return String.format("%s: %s departed", super.toString(), this.customer);
+  }
+
+  @Override
+  public Event[] simulate() {
+    // when customer departs, check if there are customers in queue
+    return new Event[] {};
+  }
+
+}