Action系のModelはActionBaseを継承するように

vcs/src/main/java/one/nem/lacerta/vcs/model/action/DeletePage.java

@@ -1,6 +1,8 @@
 package one.nem.lacerta.vcs.model.action;
 
-public class DeletePage {
+import one.nem.lacerta.vcs.model.action.common.ActionBase;
+
+public class DeletePage extends ActionBase {
 
         private int index;
 

vcs/src/main/java/one/nem/lacerta/vcs/model/action/InsertPage.java

@@ -1,6 +1,8 @@
 package one.nem.lacerta.vcs.model.action;
 
-public class InsertPage {
+import one.nem.lacerta.vcs.model.action.common.ActionBase;
+
+public class InsertPage extends ActionBase {
 
     private int index;
     private String fileName;

vcs/src/main/java/one/nem/lacerta/vcs/model/action/UpdatePage.java

@@ -1,6 +1,8 @@
 package one.nem.lacerta.vcs.model.action;
 
-public class UpdatePage {
+import one.nem.lacerta.vcs.model.action.common.ActionBase;
+
+public class UpdatePage extends ActionBase {
 
     private int index;
     private String fileName;