added template method sample

template-method/src/main/java/com/iluwatar/HalflingThief.java

@@ -0,0 +1,18 @@
+package com.iluwatar;
+
+public class HalflingThief {
+
+	private StealingMethod method;
+
+	public HalflingThief(StealingMethod method) {
+		this.method = method;
+	}
+	
+	public void steal() {
+		method.steal();
+	}
+	
+	public void changeMethod(StealingMethod method) {
+		this.method = method;
+	}
+}