#95 Updated and clarified Command pattern example

command/src/main/java/com/iluwatar/command/ShrinkSpell.java

@@ -1,33 +1,38 @@
-package com.iluwatar.command;
-
-public class ShrinkSpell extends Command {
-
-	private Size oldSize;
-	private Target target;
-
-	@Override
-	public void execute(Target target) {
-		oldSize = target.getSize();
-		target.setSize(Size.SMALL);
-		this.target = target;
-	}
-
-	@Override
-	public void undo() {
-		if (oldSize != null && target != null) {
-			Size temp = target.getSize();
-			target.setSize(oldSize);
-			oldSize = temp;
-		}
-	}
-
-	@Override
-	public void redo() {
-		undo();
-	}
-
-	@Override
-	public String toString() {
-		return "Shrink spell";
-	}
-}
+package com.iluwatar.command;
+
+/**
+ * 
+ * ShrinkSpell is a concrete command
+ *
+ */
+public class ShrinkSpell extends Command {
+
+	private Size oldSize;
+	private Target target;
+
+	@Override
+	public void execute(Target target) {
+		oldSize = target.getSize();
+		target.setSize(Size.SMALL);
+		this.target = target;
+	}
+
+	@Override
+	public void undo() {
+		if (oldSize != null && target != null) {
+			Size temp = target.getSize();
+			target.setSize(oldSize);
+			oldSize = temp;
+		}
+	}
+
+	@Override
+	public void redo() {
+		undo();
+	}
+
+	@Override
+	public String toString() {
+		return "Shrink spell";
+	}
+}