Add weapon and weapon type classes

Add classes to represent weapons and weapon types. Also add a basic sword weapon, as well as testing for the new functionality.

core/src/com/github/excaliburzero/weapons/BasicSword.java

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+package com.github.excaliburzero.weapons;
+
+/**
+ * The <code>BasicSword</code> class is used to represent a basic sword.
+ *
+ * @author Christopher Wells {@literal <cwellsny@nycap.rr.com>}
+ */
+public class BasicSword extends Weapon {
+
+    public BasicSword() {
+        super("Basic Sword", 5, 8, WeaponType.Sword);
+    }
+
+}

core/src/com/github/excaliburzero/weapons/Weapon.java

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+package com.github.excaliburzero.weapons;
+
+/**
+ * The <code>Weapon</code> class is used to represent a weapon.
+ *
+ * @author Christopher Wells {@literal <cwellsny@nycap.rr.com>}
+ */
+public abstract class Weapon {
+    private final String name;
+    private final int power;
+    private final int weight;
+    private final WeaponType type;
+
+    public Weapon(String name, int power, int weight, WeaponType type) {
+        this.name = name;
+        this.power = power;
+        this.weight = weight;
+        this.type = type;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getPower() {
+        return power;
+    }
+
+    public int getWeight() {
+        return weight;
+    }
+
+    public WeaponType getType() {
+        return type;
+    }
+}

core/src/com/github/excaliburzero/weapons/WeaponType.java

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+package com.github.excaliburzero.weapons;
+
+/**
+ * The <code>WeaponType</code> enum is used to represent the different possible
+ * types of weapons.
+ *
+ * @author Christopher Wells {@literal <cwellsny@nycap.rr.com>}
+ */
+public enum WeaponType {
+    Sword, Axe, Bow
+}

core/test/com/github/excaliburzero/weapons/WeaponTest.java

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+package com.github.excaliburzero.weapons;
+
+import org.junit.Test;
+import static org.junit.Assert.*;
+
+/**
+ * The <code>WeaponTest</code> class is used to test the various methods of the
+ * Weapon class.
+ *
+ * @author Christopher Wells {@literal <cwellsny@nycap.rr.com>}
+ */
+public class WeaponTest {
+
+    @Test
+    public void testGetters() {
+        Weapon weapon = new BasicSword();
+
+        // Test each of the getter methods
+        assertEquals("Basic Sword", weapon.getName());
+        assertEquals(5, weapon.getPower());
+        assertEquals(8, weapon.getWeight());
+        assertEquals(WeaponType.Sword, weapon.getType());
+    }
+}