diff --git a/src/main/java/cactusServer/entities/Instance.java b/src/main/java/cactusServer/entities/Instance.java
new file mode 100644
index 0000000..950b3fa
--- /dev/null
+++ b/src/main/java/cactusServer/entities/Instance.java
@@ -0,0 +1,10 @@
+package cactusServer.entities;
+
+/**
+ * �C���X�^���X
+ * @author ryo isitani
+ *
+ */
+public class Instance {
+
+}
diff --git a/src/main/java/cactusServer/models/Instances.java b/src/main/java/cactusServer/models/Instances.java
new file mode 100644
index 0000000..703317c
--- /dev/null
+++ b/src/main/java/cactusServer/models/Instances.java
@@ -0,0 +1,39 @@
+package cactusServer.models;
+
+import java.util.HashMap;
+import cactusServer.entities.Instance;
+
+/**
+ * �C���X�^���X���Ǘ�����N���X
+ * @author ryo isitani
+ *
+ */
+public class Instances {
+	private static Instances theInstance = null;
+	private HashMap<String, Instance> instanceMap = new HashMap<>();
+	
+	private Instances() {
+		
+	}
+	
+	/**
+	 * Instances�N���X���擾���� (�V���O���g��)
+	 * @return
+	 */
+	public static Instances getInstance() {
+		if (theInstance == null) {
+			theInstance = new Instances();
+		}
+		return theInstance;
+	}
+	
+	/**
+	 * ID�ɑΉ�����Instance���擾���ĕԂ�
+	 * @param instanceId �擾������Instance��ID
+	 * @return ID�ɑΉ�����Instance
+	 */
+	public Instance getInstance(String instanceId) {
+		return instanceMap.get(instanceId);
+	}
+	
+}
diff --git a/src/main/java/test/app/App.java b/src/main/java/test/app/App.java
new file mode 100644
index 0000000..0bd8958
--- /dev/null
+++ b/src/main/java/test/app/App.java
@@ -0,0 +1,12 @@
+package test.app;
+
+import javax.ws.rs.ApplicationPath;
+import javax.ws.rs.core.Application;
+
+import org.glassfish.jersey.server.ResourceConfig;
+
+@SuppressWarnings("unused")
+@ApplicationPath("/rest")
+public class App extends ResourceConfig {
+
+}
\ No newline at end of file
diff --git a/src/test/java/test/app/App.java b/src/test/java/test/app/App.java
deleted file mode 100644
index 0bd8958..0000000
--- a/src/test/java/test/app/App.java
+++ /dev/null
@@ -1,12 +0,0 @@
-package test.app;
-
-import javax.ws.rs.ApplicationPath;
-import javax.ws.rs.core.Application;
-
-import org.glassfish.jersey.server.ResourceConfig;
-
-@SuppressWarnings("unused")
-@ApplicationPath("/rest")
-public class App extends ResourceConfig {
-
-}
\ No newline at end of file