diff --git a/0-Plugin/pom.xml b/0-Plugin/pom.xml
index c062f6d..1b87eba 100644
--- a/0-Plugin/pom.xml
+++ b/0-Plugin/pom.xml
@@ -24,7 +24,19 @@
 			<version>1.0-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
-	</dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 
 	<properties>
 		<maven.compiler.source>17</maven.compiler.source>
diff --git a/0-Plugin/src/test/java/persistence/GenericCSVDAOTest.java b/0-Plugin/src/test/java/persistence/GenericCSVDAOTest.java
new file mode 100644
index 0000000..ad99a63
--- /dev/null
+++ b/0-Plugin/src/test/java/persistence/GenericCSVDAOTest.java
@@ -0,0 +1,79 @@
+package persistence;
+
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import persistence.category.CategoryEntity;
+
+import java.io.File;
+import java.io.IOException;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.*;
+
+class GenericCSVDAOTest {
+
+    GenericCSVDAO<CategoryEntity> sut;
+
+    public void beforeEachDirty() throws IOException {
+        File file = new File("test.csv");
+
+        if (file.exists()){
+            file.delete();
+        }
+        file.createNewFile();
+
+        this.sut = new GenericCSVDAO<CategoryEntity>(file,CategoryEntity::new);
+
+
+    }
+
+    @Test
+    public void addWorks() throws IOException {
+
+        beforeEachDirty();
+
+
+        assertEquals(0, sut.getALl().size());
+
+        var entityToAdd = new CategoryEntity("categoryName",99);
+        sut.add(entityToAdd);
+        var foundEntity = sut.getALl().stream().findFirst().orElseThrow();
+
+        assertEquals(entityToAdd,foundEntity);
+
+
+
+
+    }
+
+    @Test
+    public void removeWorks() throws IOException {
+
+        beforeEachDirty();
+
+
+        var entityToAdd = new CategoryEntity("categoryName",99);
+        sut.add(entityToAdd);
+
+        sut.remove(entityToAdd);
+
+        assertEquals(0, sut.getALl().size());
+    }
+
+    @Test
+    public void removeAllWorks() throws IOException {
+
+        beforeEachDirty();
+
+
+        var entityToAdd1 = new CategoryEntity("categoryName1",101);
+        sut.add(entityToAdd1);
+        var entityToAdd2 = new CategoryEntity("categoryName2",102);
+        sut.add(entityToAdd2);
+        assertEquals(2, sut.getALl().size());
+        sut.removeAll();
+
+        assertEquals(0, sut.getALl().size());
+    }
+}
\ No newline at end of file
diff --git a/1-Adapter/src/main/java/persistence/category/CategoryEntity.java b/1-Adapter/src/main/java/persistence/category/CategoryEntity.java
index ced3733..0abe8f2 100644
--- a/1-Adapter/src/main/java/persistence/category/CategoryEntity.java
+++ b/1-Adapter/src/main/java/persistence/category/CategoryEntity.java
@@ -5,6 +5,8 @@ import category.CategoryId;
 import category.CategoryName;
 import persistence.csv.CSVSerializable;
 
+import java.util.Objects;
+
 public class CategoryEntity implements CSVSerializable {
 
 	private final String name;
@@ -36,4 +38,17 @@ public class CategoryEntity implements CSVSerializable {
 	public String toCSVString() {
 		return name + CSVSerializable.seperator + Integer.toString(id);
 	}
+
+	@Override
+	public boolean equals(Object o) {
+		if (this == o) return true;
+		if (o == null || getClass() != o.getClass()) return false;
+		CategoryEntity that = (CategoryEntity) o;
+		return id == that.id && Objects.equals(name, that.name);
+	}
+
+	@Override
+	public int hashCode() {
+		return Objects.hash(name, id);
+	}
 }
diff --git a/3-Domain/pom.xml b/3-Domain/pom.xml
index bcdff14..c5248ff 100644
--- a/3-Domain/pom.xml
+++ b/3-Domain/pom.xml
@@ -19,7 +19,13 @@
 			<version>1.0-SNAPSHOT</version>
 			<scope>compile</scope>
 		</dependency>
-	</dependencies>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>RELEASE</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
 
 	<properties>
 		<maven.compiler.source>17</maven.compiler.source>