diff --git a/src/main/java/org/ntlab/acanthus_server/entities/Layers.java b/src/main/java/org/ntlab/acanthus_server/entities/Layers.java
new file mode 100644
index 0000000..c5f95eb
--- /dev/null
+++ b/src/main/java/org/ntlab/acanthus_server/entities/Layers.java
@@ -0,0 +1,5 @@
+package org.ntlab.acanthus_server.entities;
+
+public class Layers {
+
+}
diff --git a/src/main/java/org/ntlab/acanthus_server/entities/Page.java b/src/main/java/org/ntlab/acanthus_server/entities/Page.java
new file mode 100644
index 0000000..1ad44d5
--- /dev/null
+++ b/src/main/java/org/ntlab/acanthus_server/entities/Page.java
@@ -0,0 +1,6 @@
+package org.ntlab.acanthus_server.entities;
+
+public class Page {
+
+
+}
diff --git a/src/main/java/org/ntlab/acanthus_server/entities/Position.java b/src/main/java/org/ntlab/acanthus_server/entities/Position.java
new file mode 100644
index 0000000..a5ef931
--- /dev/null
+++ b/src/main/java/org/ntlab/acanthus_server/entities/Position.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_server.entities;
+
+public class Position {
+}
diff --git a/src/main/java/org/ntlab/acanthus_server/entities/Stroke.java b/src/main/java/org/ntlab/acanthus_server/entities/Stroke.java
new file mode 100644
index 0000000..e74b072
--- /dev/null
+++ b/src/main/java/org/ntlab/acanthus_server/entities/Stroke.java
@@ -0,0 +1,4 @@
+package org.ntlab.acanthus_server.entities;
+
+public class Stroke {
+}