Initial commit

src/main/java/interval/Hour.java

@@ -0,0 +1,20 @@
+package interval;
+
+import java.util.Calendar;
+import java.util.Date;
+
+public class Hour extends Minute {
+	public static final int HOURS = 1;
+
+	public Hour() {}
+
+	public Date next() {
+		calendar.add(Calendar.HOUR, HOURS);
+		return get();
+	}
+
+	protected void adjust() {
+		super.adjust();
+	    calendar.set(Calendar.MINUTE, 0);
+	}
+}