diff --git a/src/main/kotlin/eu/fosil/okupamicoche/entities/Repository.kt b/src/main/kotlin/eu/fosil/okupamicoche/entities/Repository.kt
index f14e8c9..3040a05 100644
--- a/src/main/kotlin/eu/fosil/okupamicoche/entities/Repository.kt
+++ b/src/main/kotlin/eu/fosil/okupamicoche/entities/Repository.kt
@@ -3,5 +3,6 @@ package eu.fosil.okupamicoche.entities
 interface Repository<DATA, ID> {
     fun save(data: DATA)
     fun delete(data: DATA)
+    fun findAll(): List<DATA>
     fun findById(id: ID): DATA
 }
\ No newline at end of file
diff --git a/src/main/kotlin/eu/fosil/okupamicoche/spring/jpa/TravelRepository.kt b/src/main/kotlin/eu/fosil/okupamicoche/spring/jpa/TravelRepository.kt
new file mode 100644
index 0000000..e219b18
--- /dev/null
+++ b/src/main/kotlin/eu/fosil/okupamicoche/spring/jpa/TravelRepository.kt
@@ -0,0 +1,7 @@
+package eu.fosil.okupamicoche.spring.jpa
+
+import eu.fosil.okupamicoche.entities.Travel
+import org.springframework.data.repository.CrudRepository
+import org.springframework.data.repository.Repository
+
+interface TravelRepository : Repository<Travel, Long>, CrudRepository<Travel, Long>
\ No newline at end of file
diff --git a/src/main/kotlin/eu/fosil/okupamicoche/spring/jpa/UserRepository.kt b/src/main/kotlin/eu/fosil/okupamicoche/spring/jpa/UserRepository.kt
new file mode 100644
index 0000000..ad681e4
--- /dev/null
+++ b/src/main/kotlin/eu/fosil/okupamicoche/spring/jpa/UserRepository.kt
@@ -0,0 +1,7 @@
+package eu.fosil.okupamicoche.spring.jpa
+
+import eu.fosil.okupamicoche.entities.User
+import org.springframework.data.repository.CrudRepository
+import org.springframework.data.repository.Repository
+
+interface UserRepository : Repository<User, Long>, CrudRepository<User, Long>
\ No newline at end of file
diff --git a/src/main/kotlin/eu/fosil/okupamicoche/usecases/user/ListUsers.kt b/src/main/kotlin/eu/fosil/okupamicoche/usecases/user/ListUsers.kt
new file mode 100644
index 0000000..59592bd
--- /dev/null
+++ b/src/main/kotlin/eu/fosil/okupamicoche/usecases/user/ListUsers.kt
@@ -0,0 +1,10 @@
+package eu.fosil.okupamicoche.usecases.user
+
+import eu.fosil.okupamicoche.entities.Repository
+import eu.fosil.okupamicoche.entities.User
+
+class ListUsers(private val userRepository: Repository<User, Long>) {
+    fun listUsers() {
+        userRepository.findAll()
+    }
+}
\ No newline at end of file