diff --git a/data/src/main/java/one/nem/lacerta/data/model/documents/DocumentDetail.java b/data/src/main/java/one/nem/lacerta/data/model/documents/DocumentDetail.java
new file mode 100644
index 00000000..b9149021
--- /dev/null
+++ b/data/src/main/java/one/nem/lacerta/data/model/documents/DocumentDetail.java
@@ -0,0 +1,6 @@
+package one.nem.lacerta.data.model.documents;
+
+public class DocumentDetail {
+    // ドキュメントの詳細情報
+
+}
diff --git a/data/src/main/java/one/nem/lacerta/data/model/documents/DocumentType.java b/data/src/main/java/one/nem/lacerta/data/model/documents/DocumentType.java
new file mode 100644
index 00000000..2f96ff88
--- /dev/null
+++ b/data/src/main/java/one/nem/lacerta/data/model/documents/DocumentType.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.data.model.documents;
+
+public class DocumentType {
+}
diff --git a/data/src/main/java/one/nem/lacerta/data/model/documents/Meta.java b/data/src/main/java/one/nem/lacerta/data/model/documents/Meta.java
new file mode 100644
index 00000000..9e7b14be
--- /dev/null
+++ b/data/src/main/java/one/nem/lacerta/data/model/documents/Meta.java
@@ -0,0 +1,7 @@
+package one.nem.lacerta.data.model.documents;
+
+public class Meta {
+    // ドキュメントのメタ情報
+    public String id; // ドキュメントの内部ID(UUIDv4?)
+    public
+}
diff --git a/data/src/main/java/one/nem/lacerta/data/repository/Documents.java b/data/src/main/java/one/nem/lacerta/data/repository/Documents.java
index 4a4ef54a..6f1517f0 100644
--- a/data/src/main/java/one/nem/lacerta/data/repository/Documents.java
+++ b/data/src/main/java/one/nem/lacerta/data/repository/Documents.java
@@ -1,4 +1,5 @@
 package one.nem.lacerta.data.repository;
 
 public interface Documents {
+
 }