add comments to the field package

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

@@ -19,6 +19,9 @@ public class BooleanRegister extends ModbusRegister{
         updateMapOfRegisters(label, address);       //add the address to the map
     }
     @Override
+    /**
+     * function to read a boolean datapoint from the modbus register
+     */
     public void read() {
         if(bdp.isOutput()){
             return;      //if it is an output datapoint, it is not read
@@ -27,6 +30,9 @@ public class BooleanRegister extends ModbusRegister{
     }
 
     @Override
+    /**
+     * function to write a boolean datapoint on the modbus register
+     */
     public void write(DataPoint dp) {
         bdp = (BooleanDataPoint) dp;    //make the empty datapoint to the desired datapoint, which is to be written on the address
         value = bdp.getValue();         //store the value of the datapoint