Appears on the console:
java.sql.SQLException: No suitable driver found for jdbc:AulaFBD://localhost:5432/TrabalhoFBD
at java.sql.DriverManager.getConnection(DriverManager.java:689)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at conexao.<init>(conexao.java:19)
at Principal.main(Principal.java:5)