add new IllegalIdentifierChangeException

scm-core/src/main/java/sonia/scm/IllegalIdentifierChangeException.java

@@ -0,0 +1,21 @@
+package sonia.scm;
+
+import java.util.Collections;
+
+public class IllegalIdentifierChangeException extends BadRequestException {
+
+  private static final String CODE = "thbsUFokjk";
+
+  public IllegalIdentifierChangeException(ContextEntry.ContextBuilder context, String message) {
+    super(context.build(), message);
+  }
+
+  public IllegalIdentifierChangeException(String message) {
+    super(Collections.emptyList(), message);
+  }
+
+  @Override
+  public String getCode() {
+    return CODE;
+  }
+}