// to be processed in the outer catch block
                throw e;
            } catch (RuntimeException e) {
                throw new PluginExecutionException(mojoExecution, project, e);
            }
        } catch (MavenException e) {
            throw e;
        } catch (PluginContainerException e) {
            mojoExecutionListener.afterExecutionFailure(

                }
            }

            if (pluginDescriptor == null) {
                throw new IOException("No plugin descriptor found at " + getPluginDescriptorLocation());
            }
        } catch (IOException e) {
            throw new PluginDescriptorParsingException(plugin, pluginFile.getAbsolutePath(), e);
        }

        List<String> errors = new ArrayList<>();

            PluginContainer childContainer, PluginContainer parentContainer, boolean handleAsInheritance) {
        throw new UnsupportedOperationException();
    }

    public static List<Plugin> orderAfterMerge(
            List<Plugin> merged, List<Plugin> highPrioritySource, List<Plugin> lowPrioritySource) {
        throw new UnsupportedOperationException();
    }

        try {
            return new Metadata(delegate.read(reader, strict));
        } catch (XMLStreamException e) {
            throw new XmlPullParserException(e.getMessage(), null, e);
        }
    }

    /**
     * Method read.
     *
     * @param reader a reader object.
     * @return Metadata

        } catch (PluginResolutionException e) {
            throw new PluginNotFoundException(plugin, project.getPluginArtifactRepositories());
        } catch (PluginDescriptorParsingException | InvalidPluginDescriptorException e) {
            throw new PluginManagerException(plugin, e.getMessage(), e);
        }
    }

            // original recommended version
            version = restriction.recommendedVersion;
        }
        /* TODO should throw this immediately, but need artifact
                else
                {
                    throw new OverConstrainedVersionException( "Restricting incompatible version ranges" );
                }
        */

        return new VersionRange(version, restrictions);

            throw result.getVersionRangeViolation(0);
        }

        // Transfer Error

        if (result.hasErrorArtifactExceptions()) {
            throw result.getErrorArtifactExceptions().get(0);
        }

        if (result.hasMissingArtifacts()) {
            throw new MultipleArtifactsNotFoundException(
                    request.getArtifact(),
                    toList(result.getArtifacts()),

            return parseArgs("atFile", args);
        } catch (ParseException e) {
            throw new IllegalArgumentException(
                    "Failed to parse arguments from file (" + atFile + "): " + e.getMessage(), e.getCause());
        } catch (IOException e) {
            throw new IllegalStateException("Error reading config file: " + atFile, e);
        }
    }

            return container.lookup(type);
        } catch (ComponentLookupException e) {
            throw new LookupException(e);
        }
    }

    @Override
    public <T> T lookup(Class<T> type, String name) {
        try {
            return container.lookup(type, name);
        } catch (ComponentLookupException e) {
            throw new LookupException(e);
        }
    }

    @Override

        for (Entry<Object, Object> provide : provides.entrySet()) {
            String key = (String) provide.getKey();
            String value = (String) provide.getValue();

            if (value == null) {
                throw new MisconfiguredToolchainException(
                        "Provides token '" + key + "' doesn't have any value configured.");
            }

            RequirementMatcher matcher;
            if ("version".equals(key)) {