diff --git a/devkit-core/src/main/java/cn/org/codecrafters/devkit/core/exceptions/package-info.java b/devkit-core/src/main/java/cn/org/codecrafters/devkit/core/exceptions/package-info.java
new file mode 100644
index 0000000..4aa1c6f
--- /dev/null
+++ b/devkit-core/src/main/java/cn/org/codecrafters/devkit/core/exceptions/package-info.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2023 CodeCraftersCN.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * Exceptions will be used in JDevKit.
+ *
+ * @author Zihlu Wang
+ * @since 29 Jul 2023
+ */
+package cn.org.codecrafters.devkit.core.exceptions;
\ No newline at end of file
diff --git a/devkit-core/src/main/java/cn/org/codecrafters/devkit/core/package-info.java b/devkit-core/src/main/java/cn/org/codecrafters/devkit/core/package-info.java
new file mode 100644
index 0000000..539ec58
--- /dev/null
+++ b/devkit-core/src/main/java/cn/org/codecrafters/devkit/core/package-info.java
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2023 CodeCraftersCN.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * The core package for JDevKit, containing the core classes of JDevKit.
+ *
+ * @author Zihlu Wang
+ * @since 29 Jul 2023
+ */
+package cn.org.codecrafters.devkit.core;
\ No newline at end of file