read csv file and add some comments

src/main/java/ch/hevs/isi/field/BooleanRegister.java

@@ -1,6 +1,7 @@
 package ch.hevs.isi.field;
 
 import ch.hevs.isi.core.BooleanDataPoint;
+import ch.hevs.isi.core.DataPoint;
 
 public class BooleanRegister extends ModbusRegister{
     private boolean value;
@@ -11,7 +12,6 @@ public class BooleanRegister extends ModbusRegister{
         value = bdp.getValue();
         updateMapOfRegisters(bdp, address);
     }
-
     @Override
     public void read() {
         bdp.setValue(ModbusAccessor.getMySelf().readBoolean(this.getAddress()));