all sorts of things

3-Domain/src/main/java/category/Category.java

@@ -19,6 +19,11 @@ public class Category {
 		return name;
 	}
 
+	@Override
+	public String toString() {
+		return name.toString();
+	}
+
 	public CategoryId getId() {
 		return id;
 	}

3-Domain/src/main/java/category/CategoryName.java

@@ -41,4 +41,9 @@ public class CategoryName {
 	public int hashCode() {
 		return name != null ? name.hashCode() : 0;
 	}
+
+	@Override
+	public String toString() {
+				return name;
+	}
 }

3-Domain/src/main/java/link/Link.java

@@ -53,6 +53,15 @@ public class Link {
 		return url.equals(link.url);
 	}
 
+	@Override
+	public String toString() {
+		return url +
+				" created by =" + creator +
+				", categoryIds=" + categoryIds +
+				", tags=" + tags +
+				'}';
+	}
+
 	@Override
 	public int hashCode() {
 		int result = id.hashCode();

3-Domain/src/main/java/link/LinkRepository.java

@@ -7,13 +7,14 @@ import exeptions.LinkAlreadyExists;
 import exeptions.LinkDoesNotExist;
 
 import java.util.Optional;
+import java.util.Set;
 
 public class LinkRepository {
 
 	final private CustomSet<Link> links;
 
 	public LinkRepository(PersistenceAdapter<Link> linkPersistenceAdapter) {
-		this.links = new CustomSetPersistenceDecorator(linkPersistenceAdapter);
+		this.links = new CustomSetPersistenceDecorator<>(linkPersistenceAdapter);
 	}
 
 	public Optional<Link> getById(LinkId id) {
@@ -41,6 +42,10 @@ public class LinkRepository {
 		links.add(link);
 	}
 
+	public Set<Link> getAll() {
+		return links.getSet();
+	}
+
 	private void remove(Link link) {
 		links.remove(link);
 	}

3-Domain/src/main/java/tag/Tag.java

@@ -5,7 +5,7 @@ import java.util.Optional;
 public class Tag {
 
 	private TagName name;
-	private Optional<String> additionalData;
+	private Optional<String> additionalData = Optional.empty();
 
 	public Tag(TagName name) {
 		this.name = name;
@@ -21,6 +21,11 @@ public class Tag {
 		this.additionalData = additionalData;
 	}
 
+	@Override
+	public String toString() {
+		return "Tag: " + name + " " + additionalData.orElse("");
+	}
+
 	public TagName getName() {
 		return name;
 	}

3-Domain/src/main/java/tag/TagName.java

@@ -9,4 +9,9 @@ public record TagName(String name) {
 			throw new IllegalValueObjectArgument("A Tag name must be a valid non-empty string.");
 		}
 	}
+
+	@Override
+	public String toString() {
+		return name;
+	}
 }

3-Domain/src/main/java/user/Username.java

@@ -9,4 +9,9 @@ public record Username(String username) {
 			throw new IllegalValueObjectArgument("A username must be a valid non-empty string.");
 		}
 	}
+
+	@Override
+	public String toString() {
+		return username;
+	}
 }