diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/HelloWorldRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/HelloWorldRest.java
new file mode 100644
index 0000000..ab532b0
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/HelloWorldRest.java
@@ -0,0 +1,10 @@
+package org.ntlab.acanthus_client.resources;
+
+import okhttp3.ResponseBody;
+import retrofit2.Call;
+import retrofit2.http.GET;
+
+public interface HelloWorldRest {
+    @GET("hello_world")
+    public Call<String> getHelloWorld();
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java
deleted file mode 100644
index b353219..0000000
--- a/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/HelloWorldRest.java
+++ /dev/null
@@ -1,10 +0,0 @@
-package org.ntlab.acanthus_client.resources.accounts;
-
-import okhttp3.ResponseBody;
-import retrofit2.Call;
-import retrofit2.http.GET;
-
-public interface HelloWorldRest {
-    @GET("hello_world")
-    public Call<String> getHelloWorld();
-}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/InvitedRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/InvitedRest.java
new file mode 100644
index 0000000..71cf72f
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/InvitedRest.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_client.resources.accounts;
+
+public interface InvitedRest {
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/LoginRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/LoginRest.java
new file mode 100644
index 0000000..630ee4b
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/LoginRest.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_client.resources.accounts;
+
+public interface LoginRest {
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/WorkRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/WorkRest.java
new file mode 100644
index 0000000..68c559c
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/accounts/WorkRest.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_client.resources.accounts;
+
+public interface WorkRest {
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/EditorsRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/EditorsRest.java
new file mode 100644
index 0000000..39d721a
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/EditorsRest.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_client.resources.gallery;
+
+public interface EditorsRest {
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/GalleryRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/GalleryRest.java
new file mode 100644
index 0000000..50610d5
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/GalleryRest.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_client.resources.gallery;
+
+public interface GalleryRest {
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/InvitesRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/InvitesRest.java
new file mode 100644
index 0000000..f05d6bc
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/InvitesRest.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_client.resources.gallery;
+
+public interface InvitesRest {
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/LayersRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/LayersRest.java
new file mode 100644
index 0000000..028a4b8
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/LayersRest.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_client.resources.gallery;
+
+public interface LayersRest {
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
new file mode 100644
index 0000000..827ca44
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_client.resources.gallery;
+
+public interface StrokesRest {
+}
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/main_menu_ui/home/HomeViewModel.java b/app/src/main/java/org/ntlab/acanthus_client/views/main_menu_ui/home/HomeViewModel.java
index 72e0bd7..b094d92 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/main_menu_ui/home/HomeViewModel.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/main_menu_ui/home/HomeViewModel.java
@@ -2,7 +2,7 @@
 
 import android.widget.EditText;
 
-import org.ntlab.acanthus_client.resources.accounts.HelloWorldRest;
+import org.ntlab.acanthus_client.resources.HelloWorldRest;
 
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;