diff --git a/lib/taskana-core/src/main/java/pro/taskana/impl/ClassificationImpl.java b/lib/taskana-core/src/main/java/pro/taskana/impl/ClassificationImpl.java
index 7af1647c0..ddff3fc44 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/impl/ClassificationImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/impl/ClassificationImpl.java
@@ -1,6 +1,7 @@
 package pro.taskana.impl;
 
 import java.time.Instant;
+import java.util.Objects;
 
 import pro.taskana.Classification;
 import pro.taskana.ClassificationSummary;
@@ -8,31 +9,13 @@ import pro.taskana.ClassificationSummary;
 /**
  * Classification entity.
  */
-public class ClassificationImpl implements Classification {
+public class ClassificationImpl extends ClassificationSummaryImpl implements Classification {
 
-    private String id;
-    private String key;
-    private String parentId;
-    private String parentKey;
-    private String category;
-    private String type;
-    private String domain;
     private Boolean isValidInDomain;
     private Instant created;
     private Instant modified;
-    private String name;
     private String description;
-    private int priority;
-    private String serviceLevel; // PddDThhHmmM
     private String applicationEntryPoint;
-    private String custom1;
-    private String custom2;
-    private String custom3;
-    private String custom4;
-    private String custom5;
-    private String custom6;
-    private String custom7;
-    private String custom8;
 
     ClassificationImpl() {
     }
@@ -63,72 +46,6 @@ public class ClassificationImpl implements Classification {
         this.custom8 = classification.getCustom8();
     }
 
-    @Override
-    public String getId() {
-        return id;
-    }
-
-    public void setId(String id) {
-        this.id = id;
-    }
-
-    @Override
-    public String getKey() {
-        return key;
-    }
-
-    public void setKey(String key) {
-        this.key = key;
-    }
-
-    @Override
-    public String getParentId() {
-        return parentId;
-    }
-
-    @Override
-    public void setParentId(String parentId) {
-        this.parentId = parentId;
-    }
-
-    @Override
-    public String getParentKey() {
-        return parentKey;
-    }
-
-    @Override
-    public void setParentKey(String parentKey) {
-        this.parentKey = parentKey;
-    }
-
-    @Override
-    public String getType() {
-        return type;
-    }
-
-    public void setType(String type) {
-        this.type = type;
-    }
-
-    @Override
-    public String getCategory() {
-        return category;
-    }
-
-    @Override
-    public void setCategory(String category) {
-        this.category = category;
-    }
-
-    @Override
-    public String getDomain() {
-        return this.domain;
-    }
-
-    public void setDomain(String domain) {
-        this.domain = domain;
-    }
-
     @Override
     public Boolean getIsValidInDomain() {
         return isValidInDomain;
@@ -157,16 +74,6 @@ public class ClassificationImpl implements Classification {
         this.modified = modified;
     }
 
-    @Override
-    public String getName() {
-        return name;
-    }
-
-    @Override
-    public void setName(String name) {
-        this.name = name;
-    }
-
     @Override
     public String getDescription() {
         return description;
@@ -177,26 +84,6 @@ public class ClassificationImpl implements Classification {
         this.description = description;
     }
 
-    @Override
-    public int getPriority() {
-        return priority;
-    }
-
-    @Override
-    public void setPriority(int priority) {
-        this.priority = priority;
-    }
-
-    @Override
-    public String getServiceLevel() {
-        return serviceLevel;
-    }
-
-    @Override
-    public void setServiceLevel(String serviceLevel) {
-        this.serviceLevel = serviceLevel;
-    }
-
     @Override
     public String getApplicationEntryPoint() {
         return applicationEntryPoint;
@@ -207,86 +94,6 @@ public class ClassificationImpl implements Classification {
         this.applicationEntryPoint = applicationEntryPoint;
     }
 
-    @Override
-    public String getCustom1() {
-        return custom1;
-    }
-
-    @Override
-    public void setCustom1(String custom1) {
-        this.custom1 = custom1;
-    }
-
-    @Override
-    public String getCustom2() {
-        return custom2;
-    }
-
-    @Override
-    public void setCustom2(String custom2) {
-        this.custom2 = custom2;
-    }
-
-    @Override
-    public String getCustom3() {
-        return custom3;
-    }
-
-    @Override
-    public void setCustom3(String custom3) {
-        this.custom3 = custom3;
-    }
-
-    @Override
-    public String getCustom4() {
-        return custom4;
-    }
-
-    @Override
-    public void setCustom4(String custom4) {
-        this.custom4 = custom4;
-    }
-
-    @Override
-    public String getCustom5() {
-        return custom5;
-    }
-
-    @Override
-    public void setCustom5(String custom5) {
-        this.custom5 = custom5;
-    }
-
-    @Override
-    public String getCustom6() {
-        return custom6;
-    }
-
-    @Override
-    public void setCustom6(String custom6) {
-        this.custom6 = custom6;
-    }
-
-    @Override
-    public String getCustom7() {
-        return custom7;
-    }
-
-    @Override
-    public void setCustom7(String custom7) {
-        this.custom7 = custom7;
-    }
-
-    @Override
-    public String getCustom8() {
-        return custom8;
-    }
-
-    @Override
-    public void setCustom8(String custom8) {
-        this.custom8 = custom8;
-    }
-
     @Override
     public ClassificationSummary asSummary() {
         ClassificationSummaryImpl summary = new ClassificationSummaryImpl();
@@ -323,205 +130,26 @@ public class ClassificationImpl implements Classification {
     }
 
     @Override
-    public int hashCode() {
-        final int prime = 31;
-        int result = 1;
-        result = prime * result + ((applicationEntryPoint == null) ? 0 : applicationEntryPoint.hashCode());
-        result = prime * result + ((category == null) ? 0 : category.hashCode());
-        result = prime * result + ((created == null) ? 0 : created.hashCode());
-        result = prime * result + ((custom1 == null) ? 0 : custom1.hashCode());
-        result = prime * result + ((custom2 == null) ? 0 : custom2.hashCode());
-        result = prime * result + ((custom3 == null) ? 0 : custom3.hashCode());
-        result = prime * result + ((custom4 == null) ? 0 : custom4.hashCode());
-        result = prime * result + ((custom5 == null) ? 0 : custom5.hashCode());
-        result = prime * result + ((custom6 == null) ? 0 : custom6.hashCode());
-        result = prime * result + ((custom7 == null) ? 0 : custom7.hashCode());
-        result = prime * result + ((custom8 == null) ? 0 : custom8.hashCode());
-        result = prime * result + ((description == null) ? 0 : description.hashCode());
-        result = prime * result + ((domain == null) ? 0 : domain.hashCode());
-        result = prime * result + ((id == null) ? 0 : id.hashCode());
-        result = prime * result + ((isValidInDomain == null) ? 0 : isValidInDomain.hashCode());
-        result = prime * result + ((key == null) ? 0 : key.hashCode());
-        result = prime * result + ((modified == null) ? 0 : modified.hashCode());
-        result = prime * result + ((name == null) ? 0 : name.hashCode());
-        result = prime * result + ((parentId == null) ? 0 : parentId.hashCode());
-        result = prime * result + ((parentKey == null) ? 0 : parentKey.hashCode());
-        result = prime * result + priority;
-        result = prime * result + ((serviceLevel == null) ? 0 : serviceLevel.hashCode());
-        result = prime * result + ((type == null) ? 0 : type.hashCode());
-        return result;
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        if (!super.equals(o)) {
+            return false;
+        }
+        ClassificationImpl that = (ClassificationImpl) o;
+        return Objects.equals(isValidInDomain, that.isValidInDomain)
+            && Objects.equals(created, that.created)
+            && Objects.equals(modified, that.modified)
+            && Objects.equals(description, that.description)
+            && Objects.equals(applicationEntryPoint, that.applicationEntryPoint);
     }
 
     @Override
-    public boolean equals(Object obj) {
-        if (this == obj) {
-            return true;
-        }
-        if (obj == null) {
-            return false;
-        }
-        if (getClass() != obj.getClass()) {
-            return false;
-        }
-        ClassificationImpl other = (ClassificationImpl) obj;
-        if (applicationEntryPoint == null) {
-            if (other.applicationEntryPoint != null) {
-                return false;
-            }
-        } else if (!applicationEntryPoint.equals(other.applicationEntryPoint)) {
-            return false;
-        }
-        if (category == null) {
-            if (other.category != null) {
-                return false;
-            }
-        } else if (!category.equals(other.category)) {
-            return false;
-        }
-        if (created == null) {
-            if (other.created != null) {
-                return false;
-            }
-        } else if (!created.equals(other.created)) {
-            return false;
-        }
-        if (custom1 == null) {
-            if (other.custom1 != null) {
-                return false;
-            }
-        } else if (!custom1.equals(other.custom1)) {
-            return false;
-        }
-        if (custom2 == null) {
-            if (other.custom2 != null) {
-                return false;
-            }
-        } else if (!custom2.equals(other.custom2)) {
-            return false;
-        }
-        if (custom3 == null) {
-            if (other.custom3 != null) {
-                return false;
-            }
-        } else if (!custom3.equals(other.custom3)) {
-            return false;
-        }
-        if (custom4 == null) {
-            if (other.custom4 != null) {
-                return false;
-            }
-        } else if (!custom4.equals(other.custom4)) {
-            return false;
-        }
-        if (custom5 == null) {
-            if (other.custom5 != null) {
-                return false;
-            }
-        } else if (!custom5.equals(other.custom5)) {
-            return false;
-        }
-        if (custom6 == null) {
-            if (other.custom6 != null) {
-                return false;
-            }
-        } else if (!custom6.equals(other.custom6)) {
-            return false;
-        }
-        if (custom7 == null) {
-            if (other.custom7 != null) {
-                return false;
-            }
-        } else if (!custom7.equals(other.custom7)) {
-            return false;
-        }
-        if (custom8 == null) {
-            if (other.custom8 != null) {
-                return false;
-            }
-        } else if (!custom8.equals(other.custom8)) {
-            return false;
-        }
-        if (description == null) {
-            if (other.description != null) {
-                return false;
-            }
-        } else if (!description.equals(other.description)) {
-            return false;
-        }
-        if (domain == null) {
-            if (other.domain != null) {
-                return false;
-            }
-        } else if (!domain.equals(other.domain)) {
-            return false;
-        }
-        if (id == null) {
-            if (other.id != null) {
-                return false;
-            }
-        } else if (!id.equals(other.id)) {
-            return false;
-        }
-        if (isValidInDomain == null) {
-            if (other.isValidInDomain != null) {
-                return false;
-            }
-        } else if (!isValidInDomain.equals(other.isValidInDomain)) {
-            return false;
-        }
-        if (key == null) {
-            if (other.key != null) {
-                return false;
-            }
-        } else if (!key.equals(other.key)) {
-            return false;
-        }
-        if (modified == null) {
-            if (other.modified != null) {
-                return false;
-            }
-        } else if (!modified.equals(other.modified)) {
-            return false;
-        }
-        if (name == null) {
-            if (other.name != null) {
-                return false;
-            }
-        } else if (!name.equals(other.name)) {
-            return false;
-        }
-        if (parentId == null) {
-            if (other.parentId != null) {
-                return false;
-            }
-        } else if (!parentId.equals(other.parentId)) {
-            return false;
-        }
-        if (parentKey == null) {
-            if (other.parentKey != null) {
-                return false;
-            }
-        } else if (!parentKey.equals(other.parentKey)) {
-            return false;
-        }
-        if (priority != other.priority) {
-            return false;
-        }
-        if (serviceLevel == null) {
-            if (other.serviceLevel != null) {
-                return false;
-            }
-        } else if (!serviceLevel.equals(other.serviceLevel)) {
-            return false;
-        }
-        if (type == null) {
-            if (other.type != null) {
-                return false;
-            }
-        } else if (!type.equals(other.type)) {
-            return false;
-        }
-        return true;
+    public int hashCode() {
+        return Objects.hash(super.hashCode(), isValidInDomain, created, modified, description, applicationEntryPoint);
     }
-
 }
diff --git a/lib/taskana-core/src/main/java/pro/taskana/impl/ClassificationSummaryImpl.java b/lib/taskana-core/src/main/java/pro/taskana/impl/ClassificationSummaryImpl.java
index 5331935e7..a6c6a784b 100644
--- a/lib/taskana-core/src/main/java/pro/taskana/impl/ClassificationSummaryImpl.java
+++ b/lib/taskana-core/src/main/java/pro/taskana/impl/ClassificationSummaryImpl.java
@@ -1,5 +1,7 @@
 package pro.taskana.impl;
 
+import java.util.Objects;
+
 import pro.taskana.ClassificationSummary;
 
 /**
@@ -7,24 +9,27 @@ import pro.taskana.ClassificationSummary;
  */
 public class ClassificationSummaryImpl implements ClassificationSummary {
 
-    private String id;
-    private String key;
-    private String category;
-    private String type;
-    private String domain;
-    private String name;
-    private String parentId;
-    private String parentKey;
-    private int priority;
-    private String serviceLevel; // PddDThhHmmM
-    private String custom1;
-    private String custom2;
-    private String custom3;
-    private String custom4;
-    private String custom5;
-    private String custom6;
-    private String custom7;
-    private String custom8;
+    protected String id;
+    protected String key;
+    protected String category;
+    protected String type;
+    protected String domain;
+    protected String name;
+    protected String parentId;
+    protected String parentKey;
+    protected int priority;
+    protected String serviceLevel; // PddDThhHmmM
+    protected String custom1;
+    protected String custom2;
+    protected String custom3;
+    protected String custom4;
+    protected String custom5;
+    protected String custom6;
+    protected String custom7;
+    protected String custom8;
+
+    ClassificationSummaryImpl() {
+    }
 
     @Override
     public int getPriority() {
@@ -44,9 +49,6 @@ public class ClassificationSummaryImpl implements ClassificationSummary {
         this.serviceLevel = serviceLevel;
     }
 
-    ClassificationSummaryImpl() {
-    }
-
     @Override
     public String getId() {
         return id;
@@ -200,153 +202,38 @@ public class ClassificationSummaryImpl implements ClassificationSummary {
     }
 
     @Override
-    public int hashCode() {
-        final int prime = 31;
-        int result = 1;
-        result = prime * result + ((category == null) ? 0 : category.hashCode());
-        result = prime * result + ((domain == null) ? 0 : domain.hashCode());
-        result = prime * result + ((id == null) ? 0 : id.hashCode());
-        result = prime * result + ((key == null) ? 0 : key.hashCode());
-        result = prime * result + ((name == null) ? 0 : name.hashCode());
-        result = prime * result + ((parentId == null) ? 0 : parentId.hashCode());
-        result = prime * result + ((parentKey == null) ? 0 : parentKey.hashCode());
-        result = prime * result + ((type == null) ? 0 : type.hashCode());
-        result = prime * result + ((custom1 == null) ? 0 : custom1.hashCode());
-        result = prime * result + ((custom2 == null) ? 0 : custom2.hashCode());
-        result = prime * result + ((custom3 == null) ? 0 : custom3.hashCode());
-        result = prime * result + ((custom4 == null) ? 0 : custom4.hashCode());
-        result = prime * result + ((custom5 == null) ? 0 : custom5.hashCode());
-        result = prime * result + ((custom6 == null) ? 0 : custom6.hashCode());
-        result = prime * result + ((custom7 == null) ? 0 : custom7.hashCode());
-        result = prime * result + ((custom8 == null) ? 0 : custom8.hashCode());
-        return result;
+    public boolean equals(Object o) {
+        if (this == o) {
+            return true;
+        }
+        if (o == null || getClass() != o.getClass()) {
+            return false;
+        }
+        ClassificationSummaryImpl that = (ClassificationSummaryImpl) o;
+        return priority == that.priority
+            && Objects.equals(id, that.id)
+            && Objects.equals(key, that.key)
+            && Objects.equals(category, that.category)
+            && Objects.equals(type, that.type)
+            && Objects.equals(domain, that.domain)
+            && Objects.equals(name, that.name)
+            && Objects.equals(parentId, that.parentId)
+            && Objects.equals(parentKey, that.parentKey)
+            && Objects.equals(serviceLevel, that.serviceLevel)
+            && Objects.equals(custom1, that.custom1)
+            && Objects.equals(custom2, that.custom2)
+            && Objects.equals(custom3, that.custom3)
+            && Objects.equals(custom4, that.custom4)
+            && Objects.equals(custom5, that.custom5)
+            && Objects.equals(custom6, that.custom6)
+            && Objects.equals(custom7, that.custom7)
+            && Objects.equals(custom8, that.custom8);
     }
 
     @Override
-    public boolean equals(Object obj) {
-        if (this == obj) {
-            return true;
-        }
-        if (obj == null) {
-            return false;
-        }
-        if (!(obj instanceof ClassificationSummaryImpl)) {
-            return false;
-        }
-        ClassificationSummaryImpl other = (ClassificationSummaryImpl) obj;
-        if (category == null) {
-            if (other.category != null) {
-                return false;
-            }
-        } else if (!category.equals(other.category)) {
-            return false;
-        }
-        if (domain == null) {
-            if (other.domain != null) {
-                return false;
-            }
-        } else if (!domain.equals(other.domain)) {
-            return false;
-        }
-        if (id == null) {
-            if (other.id != null) {
-                return false;
-            }
-        } else if (!id.equals(other.id)) {
-            return false;
-        }
-        if (key == null) {
-            if (other.key != null) {
-                return false;
-            }
-        } else if (!key.equals(other.key)) {
-            return false;
-        }
-        if (name == null) {
-            if (other.name != null) {
-                return false;
-            }
-        } else if (!name.equals(other.name)) {
-            return false;
-        }
-        if (parentId == null) {
-            if (other.parentId != null) {
-                return false;
-            }
-        } else if (!parentId.equals(other.parentId)) {
-            return false;
-        }
-        if (parentKey == null) {
-            if (other.parentKey != null) {
-                return false;
-            }
-        } else if (!parentKey.equals(other.parentKey)) {
-            return false;
-        }
-        if (type == null) {
-            if (other.type != null) {
-                return false;
-            }
-        } else if (!type.equals(other.type)) {
-            return false;
-        }
-        if (custom1 == null) {
-            if (other.custom1 != null) {
-                return false;
-            }
-        } else if (!custom1.equals(other.custom1)) {
-            return false;
-        }
-        if (custom2 == null) {
-            if (other.custom2 != null) {
-                return false;
-            }
-        } else if (!custom2.equals(other.custom2)) {
-            return false;
-        }
-        if (custom3 == null) {
-            if (other.custom3 != null) {
-                return false;
-            }
-        } else if (!custom3.equals(other.custom3)) {
-            return false;
-        }
-        if (custom4 == null) {
-            if (other.custom4 != null) {
-                return false;
-            }
-        } else if (!custom4.equals(other.custom4)) {
-            return false;
-        }
-        if (custom5 == null) {
-            if (other.custom5 != null) {
-                return false;
-            }
-        } else if (!custom5.equals(other.custom5)) {
-            return false;
-        }
-        if (custom6 == null) {
-            if (other.custom6 != null) {
-                return false;
-            }
-        } else if (!custom6.equals(other.custom6)) {
-            return false;
-        }
-        if (custom7 == null) {
-            if (other.custom7 != null) {
-                return false;
-            }
-        } else if (!custom7.equals(other.custom7)) {
-            return false;
-        }
-        if (custom8 == null) {
-            if (other.custom8 != null) {
-                return false;
-            }
-        } else if (!custom8.equals(other.custom8)) {
-            return false;
-        }
-        return true;
+    public int hashCode() {
+        return Objects.hash(id, key, category, type, domain, name, parentId, parentKey, priority, serviceLevel, custom1,
+            custom2, custom3, custom4, custom5, custom6, custom7, custom8);
     }
 
     @Override