Base files added.

Java-Knight/src/main/java/org/project/entity/Entity.java

@@ -0,0 +1,21 @@
+package org.project.entity;
+
+public interface Entity {
+    void attack(Entity target);
+
+    void defend();
+
+    void heal(int health);
+
+    void fillMana(int mana);
+
+    void takeDamage(int damage);
+
+    int getMaxHP();
+
+    int getMaxMP();
+
+    /*
+    TODO: ADD OTHER REQUIRED AND BONUS METHODS
+    */
+}

Java-Knight/src/main/java/org/project/entity/enemies/Enemy.java

@@ -0,0 +1,35 @@
+package org.project.entity.enemies;
+
+import org.project.object.weapons.Weapon;
+
+// TODO: UPDATE IMPLEMENTATION
+public abstract class Enemy {
+    Weapon weapon;
+    private int hp;
+    private int mp;
+
+    public Enemy(int hp, int mp, Weapon weapon) {
+        this.hp = hp;
+        this.mp = mp;
+
+        this.weapon = weapon;
+    }
+
+    // TODO: (BONUS) UPDATE THE FORMULA OF TAKING DAMAGE
+    @Override
+    public void takeDamage(int damage) {
+        hp -= damage;
+    }
+
+    public int getHp() {
+        return hp;
+    }
+
+    public int getMp() {
+        return mp;
+    }
+
+    public Weapon getWeapon() {
+        return weapon;
+    }
+}

Java-Knight/src/main/java/org/project/entity/enemies/Skeleton.java

@@ -0,0 +1,6 @@
+package org.project.entity.enemies;
+
+// TODO: UPDATE IMPLEMENTATION
+public class Skeleton {
+    // TODO: DESIGN ENEMY'S WEAPON AND ARMOR AND IMPLEMENT THE CONSTRUCTOR
+}

Java-Knight/src/main/java/org/project/entity/players/Knight.java

@@ -0,0 +1,6 @@
+package org.project.entity.players;
+
+// TODO: UPDATE IMPLEMENTATION
+public class Knight {
+    // TODO: DESIGN KNIGHT'S WEAPON AND ARMOR AND IMPLEMENT THE CONSTRUCTOR
+}

Java-Knight/src/main/java/org/project/entity/players/Player.java

@@ -0,0 +1,89 @@
+package org.project.entity.players;
+
+import org.project.entity.Entity;
+import org.project.object.armors.Armor;
+import org.project.object.weapons.Weapon;
+
+// TODO: UPDATE IMPLEMENTATION
+public abstract class Player {
+    protected String name;
+    Weapon weapon;
+    Armor armor;
+    private int hp;
+    private int maxHP;
+    private int mp;
+    private int maxMP;
+
+    public Player(String name, int hp, int mp, Weapon weapon, Armor armor) {
+        this.name = name;
+        this.hp = hp;
+        this.mp = mp;
+
+        this.weapon = weapon;
+        this.armor = armor;
+    }
+
+    @Override
+    public void attack(Entity target) {
+        target.takeDamage(weapon.getDamage());
+    }
+
+    @Override
+    public void defend() {
+        // TODO: (BONUS) IMPLEMENT A DEFENSE METHOD FOR SHIELDS
+    }
+
+    // TODO: (BONUS) UPDATE THE FORMULA OF TAKING DAMAGE
+    @Override
+    public void takeDamage(int damage) {
+        hp -= damage - armor.getDefense();
+    }
+
+    @Override
+    public void heal(int health) {
+        hp += health;
+        if (hp > maxHP) {
+            hp = maxHP;
+        }
+    }
+
+    @Override
+    public void fillMana(int mana) {
+        mp += mana;
+        if (mp > maxMP) {
+            mp = maxMP;
+        }
+    }
+
+
+    public String getName() {
+        return name;
+    }
+
+    public int getHp() {
+        return hp;
+    }
+
+    @Override
+    public int getMaxHP() {
+        return maxHP;
+    }
+
+    public int getMp() {
+        return mp;
+    }
+
+    @Override
+    public int getMaxMP() {
+        return maxMP;
+    }
+
+    public Weapon getWeapon() {
+        return weapon;
+    }
+
+    public Armor getArmor() {
+        return armor;
+    }
+
+}