diff --git a/server/src/main/java/de/uftos/entities/LessonsCount.java b/server/src/main/java/de/uftos/entities/LessonsCount.java
index 1e3f074cd..4933684fa 100644
--- a/server/src/main/java/de/uftos/entities/LessonsCount.java
+++ b/server/src/main/java/de/uftos/entities/LessonsCount.java
@@ -1,6 +1,10 @@
 package de.uftos.entities;
 
-import jakarta.persistence.*;
+import jakarta.persistence.Entity;
+import jakarta.persistence.GeneratedValue;
+import jakarta.persistence.GenerationType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
 import lombok.Data;
 import lombok.NoArgsConstructor;
 
diff --git a/server/src/main/java/de/uftos/services/ConstraintInstanceService.java b/server/src/main/java/de/uftos/services/ConstraintInstanceService.java
index 162278cad..6e832e871 100644
--- a/server/src/main/java/de/uftos/services/ConstraintInstanceService.java
+++ b/server/src/main/java/de/uftos/services/ConstraintInstanceService.java
@@ -28,11 +28,11 @@ public ConstraintInstanceService(ConstraintInstanceRepository repository) {
   }
 
   /**
-   * Creates a new constraint instance
+   * Creates a new constraint instance.
    *
-   * @param signatureId the constraint signature id
-   * @param request     the constraint instance request object
-   * @return the newly created constraint instance
+   * @param signatureId the constraint signature id.
+   * @param request     the constraint instance request object.
+   * @return the newly created constraint instance.
    */
   public ConstraintInstance create(String signatureId, ConstraintInstanceRequestDto request) {
     return null;
@@ -54,7 +54,7 @@ public Page<ConstraintInstance> get(String signatureId, Pageable pageable) {
    *
    * @param id the ID of the constraintInstance.
    * @return the constraintInstance with the given ID.
-   * @throws ResponseStatusException is thrown if the ID doesn't have a corresponding constraintInstance.
+   * @throws ResponseStatusException if the ID doesn't have a corresponding constraintInstance.
    */
   public ConstraintInstance getById(String signatureId, String id) {
     return this.repository.findById(id)
diff --git a/server/src/main/java/de/uftos/services/ConstraintSignatureService.java b/server/src/main/java/de/uftos/services/ConstraintSignatureService.java
index 9ba187b39..8ecd2f0ee 100644
--- a/server/src/main/java/de/uftos/services/ConstraintSignatureService.java
+++ b/server/src/main/java/de/uftos/services/ConstraintSignatureService.java
@@ -41,7 +41,7 @@ public Page<ConstraintSignature> get(Pageable pageable) {
    *
    * @param id the ID of the constraintSignature.
    * @return the constraintSignature with the given ID.
-   * @throws ResponseStatusException is thrown if the ID doesn't have a corresponding constraintSignature.
+   * @throws ResponseStatusException if the ID doesn't have a corresponding constraintSignature.
    */
   public ConstraintSignature getById(String id) {
     return this.repository.findById(id)