diff --git a/src/main/java/tech/ailef/dbadmin/external/MvcConfig.java b/src/main/java/tech/ailef/dbadmin/external/MvcConfig.java
index 50f98db..2af527b 100644
--- a/src/main/java/tech/ailef/dbadmin/external/MvcConfig.java
+++ b/src/main/java/tech/ailef/dbadmin/external/MvcConfig.java
@@ -1,3 +1,23 @@
+/* 
+ * Spring Boot Database Admin - An automatically generated CRUD admin UI for Spring Boot apps
+
+ * Copyright (C) 2023 Ailef (http://ailef.tech)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
 package tech.ailef.dbadmin.external;
 
 import org.springframework.beans.factory.annotation.Autowired;
diff --git a/src/main/java/tech/ailef/dbadmin/external/controller/DataExportController.java b/src/main/java/tech/ailef/dbadmin/external/controller/DataExportController.java
index 5573e61..1ec17d2 100644
--- a/src/main/java/tech/ailef/dbadmin/external/controller/DataExportController.java
+++ b/src/main/java/tech/ailef/dbadmin/external/controller/DataExportController.java
@@ -1,3 +1,23 @@
+/* 
+ * Spring Boot Database Admin - An automatically generated CRUD admin UI for Spring Boot apps
+
+ * Copyright (C) 2023 Ailef (http://ailef.tech)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
 package tech.ailef.dbadmin.external.controller;
 
 import java.io.ByteArrayOutputStream;
@@ -46,6 +66,7 @@ import tech.ailef.dbadmin.external.dbmapping.query.DbQueryResultRow;
 import tech.ailef.dbadmin.external.dto.DataExportFormat;
 import tech.ailef.dbadmin.external.dto.QueryFilter;
 import tech.ailef.dbadmin.external.exceptions.DbAdminException;
+import tech.ailef.dbadmin.external.exceptions.DbAdminNotFoundException;
 import tech.ailef.dbadmin.external.misc.Utils;
 import tech.ailef.dbadmin.internal.model.ConsoleQuery;
 import tech.ailef.dbadmin.internal.repository.ConsoleQueryRepository;
@@ -70,7 +91,7 @@ public class DataExportController {
 	@GetMapping("/console/export/{queryId}")
 	public ResponseEntity<byte[]> export(@PathVariable String queryId, @RequestParam String format, 
 			@RequestParam MultiValueMap<String, String> otherParams) {
-		ConsoleQuery query = queryRepository.findById(queryId).orElseThrow(() -> new DbAdminException("Query not found: " + queryId));
+		ConsoleQuery query = queryRepository.findById(queryId).orElseThrow(() -> new DbAdminNotFoundException("Query not found: " + queryId));
 		
 		DataExportFormat exportFormat = null;
 		try {
diff --git a/src/main/java/tech/ailef/dbadmin/external/controller/DefaultDbAdminController.java b/src/main/java/tech/ailef/dbadmin/external/controller/DefaultDbAdminController.java
index 66f60f1..a5d1f06 100644
--- a/src/main/java/tech/ailef/dbadmin/external/controller/DefaultDbAdminController.java
+++ b/src/main/java/tech/ailef/dbadmin/external/controller/DefaultDbAdminController.java
@@ -34,7 +34,6 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.http.HttpStatus;
 import org.springframework.jdbc.UncategorizedSQLException;
-import org.springframework.jdbc.core.JdbcTemplate;
 import org.springframework.stereotype.Controller;
 import org.springframework.transaction.TransactionSystemException;
 import org.springframework.ui.Model;
diff --git a/src/main/java/tech/ailef/dbadmin/external/dbmapping/DbAdminRepository.java b/src/main/java/tech/ailef/dbadmin/external/dbmapping/DbAdminRepository.java
index 0fe9b85..9dc25ae 100644
--- a/src/main/java/tech/ailef/dbadmin/external/dbmapping/DbAdminRepository.java
+++ b/src/main/java/tech/ailef/dbadmin/external/dbmapping/DbAdminRepository.java
@@ -1,5 +1,6 @@
 /* 
  * Spring Boot Database Admin - An automatically generated CRUD admin UI for Spring Boot apps
+
  * Copyright (C) 2023 Ailef (http://ailef.tech)
  * 
  * This program is free software: you can redistribute it and/or modify
diff --git a/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryOutputField.java b/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryOutputField.java
index c38bab9..3d1afb2 100644
--- a/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryOutputField.java
+++ b/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryOutputField.java
@@ -1,3 +1,23 @@
+/* 
+ * Spring Boot Database Admin - An automatically generated CRUD admin UI for Spring Boot apps
+
+ * Copyright (C) 2023 Ailef (http://ailef.tech)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
 package tech.ailef.dbadmin.external.dbmapping.query;
 
 import java.util.Objects;
diff --git a/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryResult.java b/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryResult.java
index c60797b..c39d22e 100644
--- a/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryResult.java
+++ b/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryResult.java
@@ -1,3 +1,23 @@
+/* 
+ * Spring Boot Database Admin - An automatically generated CRUD admin UI for Spring Boot apps
+
+ * Copyright (C) 2023 Ailef (http://ailef.tech)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
 package tech.ailef.dbadmin.external.dbmapping.query;
 
 import java.util.ArrayList;
diff --git a/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryResultRow.java b/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryResultRow.java
index a1630cd..d6d87c1 100644
--- a/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryResultRow.java
+++ b/src/main/java/tech/ailef/dbadmin/external/dbmapping/query/DbQueryResultRow.java
@@ -1,3 +1,23 @@
+/* 
+ * Spring Boot Database Admin - An automatically generated CRUD admin UI for Spring Boot apps
+
+ * Copyright (C) 2023 Ailef (http://ailef.tech)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
 package tech.ailef.dbadmin.external.dbmapping.query;
 
 import java.util.HashMap;
diff --git a/src/main/java/tech/ailef/dbadmin/external/dto/DataExportFormat.java b/src/main/java/tech/ailef/dbadmin/external/dto/DataExportFormat.java
index 442e036..14a1527 100644
--- a/src/main/java/tech/ailef/dbadmin/external/dto/DataExportFormat.java
+++ b/src/main/java/tech/ailef/dbadmin/external/dto/DataExportFormat.java
@@ -1,3 +1,23 @@
+/* 
+ * Spring Boot Database Admin - An automatically generated CRUD admin UI for Spring Boot apps
+
+ * Copyright (C) 2023 Ailef (http://ailef.tech)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
 package tech.ailef.dbadmin.external.dto;
 
 public enum DataExportFormat {
diff --git a/src/main/java/tech/ailef/dbadmin/external/exceptions/DbAdminNotFoundException.java b/src/main/java/tech/ailef/dbadmin/external/exceptions/DbAdminNotFoundException.java
index a147db2..1be0cd1 100644
--- a/src/main/java/tech/ailef/dbadmin/external/exceptions/DbAdminNotFoundException.java
+++ b/src/main/java/tech/ailef/dbadmin/external/exceptions/DbAdminNotFoundException.java
@@ -1,3 +1,23 @@
+/* 
+ * Spring Boot Database Admin - An automatically generated CRUD admin UI for Spring Boot apps
+
+ * Copyright (C) 2023 Ailef (http://ailef.tech)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
 package tech.ailef.dbadmin.external.exceptions;
 
 import org.springframework.http.HttpStatus;
diff --git a/src/main/java/tech/ailef/dbadmin/internal/model/ConsoleQuery.java b/src/main/java/tech/ailef/dbadmin/internal/model/ConsoleQuery.java
index cf7fde5..d23b0ad 100644
--- a/src/main/java/tech/ailef/dbadmin/internal/model/ConsoleQuery.java
+++ b/src/main/java/tech/ailef/dbadmin/internal/model/ConsoleQuery.java
@@ -1,3 +1,23 @@
+/* 
+ * Spring Boot Database Admin - An automatically generated CRUD admin UI for Spring Boot apps
+
+ * Copyright (C) 2023 Ailef (http://ailef.tech)
+ * 
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+
 package tech.ailef.dbadmin.internal.model;
 
 import java.time.LocalDateTime;