diff --git a/app/src/main/java/org/ntlab/radishforandroidstudio/framework/RWT/RWTPad.java b/app/src/main/java/org/ntlab/radishforandroidstudio/framework/RWT/RWTPad.java
index 623c51a..d756d18 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/framework/RWT/RWTPad.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/framework/RWT/RWTPad.java
@@ -39,7 +39,7 @@
         addListener(new SamplePadListener());
     }
 
-    // TODO; 見た目の調整
+    // TODO: 見た目の調整
     @Override
     public void onDraw(Canvas canvas) {
         // super.onDraw(canvas);
diff --git a/app/src/main/java/org/ntlab/radishforandroidstudio/framework/subject/MySubject.java b/app/src/main/java/org/ntlab/radishforandroidstudio/framework/subject/MySubject.java
index 31b28fd..7b10a88 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/framework/subject/MySubject.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/framework/subject/MySubject.java
@@ -12,11 +12,13 @@
 public abstract class MySubject<ListenerType extends MyListener, EventType extends MyEvent> {
     protected Set<ListenerType> listenerSet = new CopyOnWriteArraySet<>();
 
-    protected void addListener(ListenerType listener) {
+    public MySubject() {}
+
+    public void addListener(ListenerType listener) {
         listenerSet.add(listener);
     }
 
-    protected void notifyListeners(EventType event) {
+    public void notifyListeners(EventType event) {
         for (ListenerType listener : listenerSet) {
             listener.onEvent(event);
         }
diff --git a/app/src/main/java/org/ntlab/radishforandroidstudio/framework/subject/PadSubject.java b/app/src/main/java/org/ntlab/radishforandroidstudio/framework/subject/PadSubject.java
index 97f7c74..441dad9 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/framework/subject/PadSubject.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/framework/subject/PadSubject.java
@@ -8,18 +8,9 @@
 public class PadSubject extends MySubject<PadListener, PadEvent> {
     public final static PadSubject own = new PadSubject();
 
-    private PadSubject() {}
+    private PadSubject() { super(); }
 
     public static PadSubject getInstance() {
         return own;
     }
-
-    public void addListener(PadListener listener) {
-        super.addListener(listener);
-    }
-
-    @Override
-    public void notifyListeners(PadEvent e) {
-        super.notifyListeners(e);
-    }
 }