put example code from javadoc into code block

src/main/java/org/heigit/ohsome/oshdb/helpers/OSHDBDriver.java

@@ -34,12 +34,16 @@ import org.heigit.bigspatialdata.oshdb.util.tagtranslator.TagTranslator;
 public class OSHDBDriver {
 
   /** open connection to oshdb instance.
-      props example:
-      oshdb="ignite:Path_To_Config" \ "h2:Path_To_Database"
-      prefix="global"
-      keytable="jdbc:postgresql://IP_OR_URL/keytables\${prefix}?user=ohsome&password=secret"
-      #multithreading default false, only used by h2 connections
-      multithreading=true
+   *
+   * <p>props example:</p>
+   *
+   * <pre>{@code
+   *  oshdb="ignite:Path_To_Config" \ "h2:Path_To_Database"
+   *  prefix="global"
+   *  keytable="jdbc:postgresql://IP_OR_URL/keytables\${prefix}?user=ohsome&password=secret"
+   *  #multithreading default false, only used by h2 connections
+   *  multithreading=true
+   * }</pre>
    */
   public static void connect(Map<String, String> props, Consumer<OSHDBConnection> connect)
       throws Exception {