test: Clean up throws clauses in TestUtil

Restricts throws clauses in TestUtil to SQLException rather than a
more broad Exception and removes throws clause from initDriver().

pgjdbc/src/test/java/org/postgresql/test/TestUtil.java

@@ -242,7 +242,7 @@ public static Properties loadPropertyFiles(String... names) {
     return p;
   }
 
-  public static void initDriver() throws Exception {
+  public static void initDriver() {
     synchronized (TestUtil.class) {
       if (initialized) {
         return;
@@ -281,7 +281,7 @@ public static File getFile(String name) {
    * @return connection using a privileged user mostly for tests that the ability to load C
    *         functions now as of 4/14
    */
-  public static Connection openPrivilegedDB() throws Exception {
+  public static Connection openPrivilegedDB() throws SQLException {
     initDriver();
     Properties properties = new Properties();
     properties.setProperty("user", getPrivilegedUser());
@@ -295,15 +295,15 @@ public static Connection openPrivilegedDB() throws Exception {
    *
    * @return connection
    */
-  public static Connection openDB() throws Exception {
+  public static Connection openDB() throws SQLException {
     return openDB(new Properties());
   }
 
   /*
    * Helper - opens a connection with the allowance for passing additional parameters, like
    * "compatible".
    */
-  public static Connection openDB(Properties props) throws Exception {
+  public static Connection openDB(Properties props) throws SQLException {
     initDriver();
 
     // Allow properties to override the user name.