diff --git a/src/main/groovy/biz/nellemann/hmci/App.groovy b/src/main/groovy/biz/nellemann/hmci/App.groovy
index 350568e..3ec8e4c 100644
--- a/src/main/groovy/biz/nellemann/hmci/App.groovy
+++ b/src/main/groovy/biz/nellemann/hmci/App.groovy
@@ -159,18 +159,29 @@ class App implements Runnable {
         OptionAccessor options = cli.parse(args)
         if (options.h) cli.usage()
 
+        if(options.v) {
+            // TODO - how to display correct version or build number ?
+            println("See https://bitbucket.org/mnellemann/hmci for more information.")
+            System.exit(0)
+        }
+
         ConfigObject configuration
         if(options.c) {
 
             File configurationFile = new File((String)options.config)
             if(!configurationFile.exists()) {
-                println("No configuration file found at: " + configurationFile.toString())
+                println("Error - No configuration file found at: " + configurationFile.toString())
                 System.exit(1)
             }
 
             configuration = new ConfigSlurper("development").parse(configurationFile.toURI().toURL());
         }
 
+        if(configuration == null || configuration.isEmpty()) {
+            println("Error - Empty or faulty configuration")
+            System.exit(1)
+        }
+
         new App(configuration)
         System.exit(0);
     }
@@ -179,7 +190,7 @@ class App implements Runnable {
     @Override
     void run() {
 
-        log.info("run()")
+        log.debug("run()")
 
         boolean keepRunning = true
         int executions = 0
diff --git a/src/main/groovy/biz/nellemann/hmci/InfluxClient.groovy b/src/main/groovy/biz/nellemann/hmci/InfluxClient.groovy
index 1e514b0..5135734 100644
--- a/src/main/groovy/biz/nellemann/hmci/InfluxClient.groovy
+++ b/src/main/groovy/biz/nellemann/hmci/InfluxClient.groovy
@@ -39,7 +39,7 @@ class InfluxClient {
                 BatchOptions options = BatchOptions.DEFAULTS.actions(300).flushDuration(500);
                 influxDB.enableBatch(options);
 
-                influxDB.setLogLevel(InfluxDB.LogLevel.BASIC);
+                //influxDB.setLogLevel(InfluxDB.LogLevel.BASIC);
 
                 batchPoints = BatchPoints.database(database).precision(TimeUnit.SECONDS).build();
 
diff --git a/src/main/resources/logback.xml b/src/main/resources/logback.xml
new file mode 100644
index 0000000..feefcff
--- /dev/null
+++ b/src/main/resources/logback.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder class="ch.qos.logback.classic.encoder.PatternLayoutEncoder">
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <logger name="biz.nellemann.hmci" level="INFO"/>
+
+    <root level="WARN">
+        <appender-ref ref="STDOUT" />
+    </root>
+
+</configuration>