Added comments and class diagram.

specification/src/main/java/com/iluwatar/creature/AbstractCreature.java

@@ -4,6 +4,11 @@ import com.iluwatar.property.Color;
 import com.iluwatar.property.Movement;
 import com.iluwatar.property.Size;
 
+/**
+ * 
+ * Base class for concrete creatures.
+ *
+ */
 public abstract class AbstractCreature implements Creature {
 
 	private String name;

specification/src/main/java/com/iluwatar/creature/Creature.java

@@ -4,6 +4,11 @@ import com.iluwatar.property.Color;
 import com.iluwatar.property.Movement;
 import com.iluwatar.property.Size;
 
+/**
+ * 
+ * Creature interface.
+ *
+ */
 public interface Creature {
 
 	String getName();

specification/src/main/java/com/iluwatar/creature/Dragon.java

@@ -4,6 +4,11 @@ import com.iluwatar.property.Color;
 import com.iluwatar.property.Movement;
 import com.iluwatar.property.Size;
 
+/**
+ * 
+ * Dragon creature.
+ *
+ */
 public class Dragon extends AbstractCreature {
 
 	public Dragon() {

specification/src/main/java/com/iluwatar/creature/Goblin.java

@@ -4,6 +4,11 @@ import com.iluwatar.property.Color;
 import com.iluwatar.property.Movement;
 import com.iluwatar.property.Size;
 
+/**
+ * 
+ * Goblin creature.
+ *
+ */
 public class Goblin extends AbstractCreature {
 
 	public Goblin() {

specification/src/main/java/com/iluwatar/creature/KillerBee.java

@@ -4,6 +4,11 @@ import com.iluwatar.property.Color;
 import com.iluwatar.property.Movement;
 import com.iluwatar.property.Size;
 
+/**
+ * 
+ * KillerBee creature.
+ *
+ */
 public class KillerBee extends AbstractCreature {
 
 	public KillerBee() {

specification/src/main/java/com/iluwatar/creature/Octopus.java

@@ -4,6 +4,11 @@ import com.iluwatar.property.Color;
 import com.iluwatar.property.Movement;
 import com.iluwatar.property.Size;
 
+/**
+ * 
+ * Octopus creature.
+ *
+ */
 public class Octopus extends AbstractCreature {
 
 	public Octopus() {

specification/src/main/java/com/iluwatar/creature/Shark.java

@@ -4,6 +4,11 @@ import com.iluwatar.property.Color;
 import com.iluwatar.property.Movement;
 import com.iluwatar.property.Size;
 
+/**
+ * 
+ * Shark creature.
+ *
+ */
 public class Shark extends AbstractCreature {
 
 	public Shark() {

specification/src/main/java/com/iluwatar/creature/Troll.java

@@ -4,6 +4,11 @@ import com.iluwatar.property.Color;
 import com.iluwatar.property.Movement;
 import com.iluwatar.property.Size;
 
+/**
+ * 
+ * Troll creature.
+ *
+ */
 public class Troll extends AbstractCreature {
 	
 	public Troll() {