#108 Consistent package naming throughout the examples

lazy-loading/src/main/java/com/iluwatar/lazy/loading/HolderThreadSafe.java

@@ -0,0 +1,24 @@
+package com.iluwatar.lazy.loading;
+
+/**
+ * 
+ * Same as HolderNaive but with added synchronization.
+ * This implementation is thread safe, but each {@link #getHeavy()}
+ * call costs additional synchronization overhead.
+ *
+ */
+public class HolderThreadSafe {
+	
+	private Heavy heavy;
+	
+	public HolderThreadSafe() {
+		System.out.println("HolderThreadSafe created");
+	}
+
+	public synchronized Heavy getHeavy() {
+		if (heavy == null) {
+			heavy = new Heavy();
+		}
+		return heavy;
+	}
+}