Add ModuleManager (#37)

* Add ModuleManager

* Fix CI errors

src/main/java/seedu/address/logic/ModuleManager.java

@@ -0,0 +1,25 @@
+package seedu.address.logic;
+
+import seedu.address.model.enumeration.ModuleType;
+import seedu.address.model.module.Module;
+
+/**
+ * The manager of modules.
+ */
+public class ModuleManager {
+
+    //@@author GabrielYik
+
+    //TODO
+    /**
+     * Changes the module type of the module
+     *
+     * @param module module to be changed.
+     * @param newModuleType the new type that the {@code module} should be.
+     */
+    public void updateModuleType(Module module, ModuleType newModuleType) {
+
+    }
+
+    //@@author
+}

src/main/java/seedu/address/model/util/ModuleUtil.java

@@ -7,7 +7,7 @@
  */
 public class ModuleUtil {
 
-    //@@author Gabriel
+    //@@author GabrielYik
 
     //TODO
     /**