Shutdown cli gracefully when known exceptions occur

Fixes #44

Author: pesse

src/main/java/org/utplsql/cli/Cli.java

@@ -4,6 +4,8 @@
 import com.beust.jcommander.Parameter;
 import com.beust.jcommander.ParameterException;
 import org.utplsql.api.exception.DatabaseNotCompatibleException;
+import org.utplsql.api.exception.UtPLSQLNotInstalledException;
+import org.utplsql.cli.exception.DatabaseConnectionFailed;
 
 public class Cli {
 
@@ -35,7 +37,7 @@ public static void main(String[] args) {
             } else {
                 jc.usage();
             }
-        } catch ( DatabaseNotCompatibleException e ) {
+        } catch ( DatabaseNotCompatibleException | UtPLSQLNotInstalledException | DatabaseConnectionFailed e ) {
             System.out.println(e.getMessage());
         } catch (Exception e) {
             e.printStackTrace();

src/main/java/org/utplsql/cli/RunCommand.java

@@ -8,6 +8,7 @@
 import org.utplsql.api.exception.SomeTestsFailedException;
 import org.utplsql.api.reporter.Reporter;
 import org.utplsql.api.reporter.ReporterFactory;
+import org.utplsql.cli.exception.DatabaseConnectionFailed;
 
 import java.io.File;
 import java.io.FileNotFoundException;
@@ -120,8 +121,12 @@ public int run() throws Exception {
             reporterList = initReporters(conn, reporterOptionsList);
 
         } catch (SQLException e) {
-            System.out.println(e.getMessage());
-            return Cli.DEFAULT_ERROR_CODE;
+            if ( e.getErrorCode() == 1017 || e.getErrorCode() == 12514 ) {
+                throw new DatabaseConnectionFailed(e);
+            }
+            else {
+                throw e;
+            }
         }
 
         ExecutorService executorService = Executors.newFixedThreadPool(1 + reporterList.size());

src/main/java/org/utplsql/cli/exception/DatabaseConnectionFailed.java

@@ -0,0 +1,10 @@
+package org.utplsql.cli.exception;
+
+import java.sql.SQLException;
+
+public class DatabaseConnectionFailed extends SQLException {
+
+    public DatabaseConnectionFailed(SQLException cause ) {
+        super( "Could not establish connection to database. Reason: " + cause.getMessage(), cause);
+    }
+}