Added Triplet.java and Battleship.java

src/battleship/model/Battleship.java

@@ -0,0 +1,7 @@
+package battleship.model;
+
+public class Battleship {
+
+
+
+}

src/battleship/utils/Triplet.java

@@ -0,0 +1,59 @@
+package battleship.utils;
+
+import java.util.Objects;
+
+/**
+ * tuple containing 2 unknown type elements
+ *
+ * @param <U> left
+ * @param <K> right
+ */
+public class Triplet<U, K, V> {
+
+    private final U left;
+    private final K middle;
+    private final V right;
+
+    public Triplet(U left, K middle, V right) {
+        this.left = left;
+        this.middle = middle;
+        this.right = right;
+    }
+
+    public U getLeft() {
+        return left;
+    }
+
+    public K getMiddle() {
+        return middle;
+    }
+
+    public V getRight() {
+        return right;
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj == null) {
+            return false;
+        }
+        if (getClass() != obj.getClass()) {
+            return false;
+        }
+        final Triplet<?, ?, ?> other = (Triplet<?, ?, ?>) obj;
+        return this.left.equals(other.getLeft()) && this.middle.equals(other.getMiddle()) && this.left.equals(other.getRight());
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(left, middle, right);
+    }
+    
+    @Override
+    public String toString() {
+    	return "(" + left + ", " + middle + ", " + right + ")";
+    }
+}