Second Commit.

Factory class created to encapsulate object creation.

factory/AlgFactory.java

@@ -0,0 +1,19 @@
+package factory;
+
+import model.AlgBase;
+import product.AlgShift;
+import product.AlgUnicode;
+
+
+public class AlgFactory {
+    public static AlgBase createAlgorithm(String algorithmType, String data, String mode, int key) throws Exception {
+        switch (algorithmType) {
+            case "unicode":
+                return new AlgUnicode(data, mode, key);
+            case "shift":
+                return new AlgShift(data, mode, key);
+            default:
+                throw new Exception("Unspecified algorithm: " + algorithmType);
+        }
+    }
+}