diff --git a/1-Adapter/src/main/java/persistence/CSVCategoryPersistenceAdapter.java b/1-Adapter/src/main/java/persistence/category/CSVCategoryPersistenceAdapter.java
similarity index 66%
rename from 1-Adapter/src/main/java/persistence/CSVCategoryPersistenceAdapter.java
rename to 1-Adapter/src/main/java/persistence/category/CSVCategoryPersistenceAdapter.java
index 86dff90..8a57e11 100644
--- a/1-Adapter/src/main/java/persistence/CSVCategoryPersistenceAdapter.java
+++ b/1-Adapter/src/main/java/persistence/category/CSVCategoryPersistenceAdapter.java
@@ -1,4 +1,4 @@
-package persistence;
+package persistence.category;
 
 import abstraction.PersistenceAdapter;
 import category.Category;
@@ -13,12 +13,11 @@ public class CSVCategoryPersistenceAdapter implements PersistenceAdapter<Categor
 	}
 
 	@Override
-	public Boolean remove(Category value) {
-		return null;
+	public void remove(Category value) {
 	}
 
 	@Override
-	public Boolean add(Category category) {
-		return null;
+	public void add(Category category) {
+
 	}
 }
diff --git a/1-Adapter/src/main/java/persistence/CategoryEntity.java b/1-Adapter/src/main/java/persistence/category/CategoryEntity.java
similarity index 65%
rename from 1-Adapter/src/main/java/persistence/CategoryEntity.java
rename to 1-Adapter/src/main/java/persistence/category/CategoryEntity.java
index 2f092b1..2c67dcb 100644
--- a/1-Adapter/src/main/java/persistence/CategoryEntity.java
+++ b/1-Adapter/src/main/java/persistence/category/CategoryEntity.java
@@ -1,4 +1,4 @@
-package persistence;
+package persistence.category;
 
 public record CategoryEntity(String name, int id) {