diff --git a/1-Adapter/src/main/java/cli/category/CategoryCliAdapter.java b/1-Adapter/src/main/java/cli/category/CategoryCliAdapter.java
new file mode 100644
index 0000000..8d62786
--- /dev/null
+++ b/1-Adapter/src/main/java/cli/category/CategoryCliAdapter.java
@@ -0,0 +1,26 @@
+package cli.category;
+
+import category.CategoryName;
+import category.CategoryUseCase;
+
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class CategoryCliAdapter {
+
+	private final CategoryUseCase categoryUseCase;
+
+	public CategoryCliAdapter(CategoryUseCase categoryUseCase) {
+		this.categoryUseCase = categoryUseCase;
+	}
+
+	public void addCategory(String name) {
+		categoryUseCase.addCategory(new CategoryName(name));
+	}
+
+	public Set<String> getCategories() {
+		return categoryUseCase.getCategories().stream().map(Objects::toString).collect(Collectors.toSet());
+	}
+
+}