Cannot execute a command on several lines

I have the following script (notice the ';' at the end) which executes fine with the run command :

java-new-enum --named Language --targetPackage com.test.model ;

But if I have the same command on several lines, it doesn't work anymore (so the ';' doesn't seem to mark the end of line)

java-new-enum  
    --named Language 
    --targetPackage com.test.model ;