diff --git a/src/main/kotlin/de/envite/greenbpm/optimzetoxes/xesmapping/XesDefinition.kt b/src/main/kotlin/de/envite/greenbpm/optimzetoxes/xesmapping/XesDefinition.kt
index cf1e787..63f8aab 100644
--- a/src/main/kotlin/de/envite/greenbpm/optimzetoxes/xesmapping/XesDefinition.kt
+++ b/src/main/kotlin/de/envite/greenbpm/optimzetoxes/xesmapping/XesDefinition.kt
@@ -15,7 +15,8 @@ data class XesDefinition(
 
 @Throws(Exception::class)
 fun XesDefinition.toXMLFile(basePath: String?, logger: Logger? = null) {
-    val filename = "${basePath?.plus("/") ?: ""}$processDefinitionId.xml"
+    val prefix = if (!basePath.isNullOrEmpty()) "$basePath/" else ""
+    val filename = "$prefix$processDefinitionId.xml"
 
     logger?.debug("Writing XES to file {}", filename)
 
diff --git a/src/main/resources/application.yaml b/src/main/resources/application.yaml
index 1b1fbd0..b5fb47a 100644
--- a/src/main/resources/application.yaml
+++ b/src/main/resources/application.yaml
@@ -10,4 +10,5 @@ optimize:
   token-base-url: https://login.cloud.camunda.io/oauth/token
 
 xes-mapping:
-  base-path: <xes-result-filename-or-path>.xml
+  # Optionally: Specify the base bath for the resulting XML(s).
+  base-path: