add comments to the field package

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

@@ -28,17 +28,23 @@ public class FloatRegister extends ModbusRegister{
     }
 
     @Override
+    /**
+     *  function to read a float datapoint from the modbus register
+     */
     public void read() {
         if(fdp.isOutput()){
             return;     //if it is an output datapoint, it is not read
         }
         Float value = ModbusAccessor.getMySelf().readFloat(this.getAddress()); //read the value
-        value = value * range;
-        value = value + offset;
+        value = value * range;      //calculate value
+        value = value + offset;     //calculate value
         fdp.setValue(value);
     }
 
     @Override
+    /**
+     * function to write a boolean datapoint on the modbus register
+     */
     public void write(DataPoint dp) {
         fdp = (FloatDataPoint) dp;      //make the empty datapoint to the desired datapoint, which is to be written on the address
         value = fdp.getValue();         //store the value of the datapoint